CN-122001083-A - Power quality management system

CN122001083ACN 122001083 ACN122001083 ACN 122001083ACN-122001083-A

Abstract

The embodiment of the application provides a power quality management system. The application relates to the technical field of power quality management, which comprises a main station, a first monitoring terminal and a second monitoring terminal, wherein the main station is used for updating a line topology diagram of a target area according to an obtained modification scheme of a power quality problem, sending a data acquisition instruction to the first monitoring terminal, checking the modification scheme of the power quality problem according to power data and the line topology diagram to determine whether to implement the modification scheme, the first monitoring terminal is used for sending the data acquisition instruction to the second monitoring terminal, and the second monitoring terminal is used for obtaining pre-frozen power data according to the data acquisition instruction and sending the power data to the first monitoring terminal. The method is used for achieving the technical effect of improving the power quality rectifying efficiency of the power distribution network.

Inventors

YAN ZHENCHENG
XU CANBIN
YU DAILIN
FANG ZEFENG

Assignees

广东电网有限责任公司潮州供电局
广东电网有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260108

Claims (10)

1. The power quality management system is characterized by comprising a main station, a first monitoring terminal and a second monitoring terminal, wherein the first monitoring terminal is arranged in a target station area, and the second monitoring terminal is arranged in a low-voltage down-lead of the target station area; The master station is used for updating a line topology diagram of the target station area according to an improvement scheme of the acquired electric energy quality problem and sending a data acquisition instruction to the first monitoring terminal, wherein the line topology diagram is obtained by mapping a low-voltage distribution line of the target station area in advance; The first monitoring terminal is used for sending the data acquisition instruction to the second monitoring terminal; The second monitoring terminal is used for acquiring pre-frozen electric energy data according to the data acquisition instruction and sending the electric energy data to the first monitoring terminal; the first monitoring terminal is further used for sending the electric energy data to the master station; And the master station is further configured to check a modification scheme of the power quality problem according to the power data and the line topology diagram, so as to determine whether to implement the modification scheme.
2. The system according to claim 1, wherein the primary station is specifically configured to: Performing simulation calculation on the impedance value in the line topological graph according to the electric energy data to obtain a simulation verification result corresponding to the rectification scheme; and determining whether to implement the rectification scheme based on the simulation verification result.
3. The system of claim 2, wherein the first monitoring terminal is further configured to send a load data value freeze command to the second monitoring terminal and send power quality data to the master station when a first type of power quality problem is detected; the second monitoring terminal is further used for freezing the currently acquired electric energy data according to the load data value freezing instruction, wherein the electric energy data at least comprises the electric energy quality type, the occurrence time and the impedance value of the current station area; The master station is further used for establishing a work order to be checked corresponding to the electric energy quality data according to the electric energy quality data, and determining a correction scheme of the first type of electric energy quality problem according to the work order to be checked.
4. The system of claim 3, wherein the first type of power quality problem includes a heavy overload problem and a three-phase imbalance problem, and wherein the first monitoring terminal is configured to: when the load capacity of the target platform area calculated according to a heavy overload checking formula exceeds a preset heavy overload threshold value, determining that the heavy overload problem occurs; and determining that the three-phase imbalance problem occurs when the three-phase imbalance of the target platform area calculated according to the three-phase imbalance test formula exceeds a preset three-phase imbalance threshold value.
5. A system according to claim 3, wherein the master station, when determining the modification scheme of the first type of power quality problem according to the work order to be inspected, is specifically configured to: And cutting the load according to the work order to be inspected, and at least one of replacing the low-voltage lead and replacing the distribution transformer is determined as a rectification scheme corresponding to the first type of electric energy quality problem.
6. The system of claim 1, wherein the master station is further configured to receive a second type of power quality problem reported by a user, establish a work order to be inspected corresponding to the second type of power quality problem according to the second type of power quality problem, and determine an improvement scheme for the second type of power quality problem according to the work order to be inspected.
7. The system according to claim 4, wherein when the first type of power quality problem is a heavy overload problem, the master station is specifically configured to: calculating the impedance value in the line topological graph according to the heavy overload test formula to obtain a heavy overload simulation test result; when the simulated load capacity in the heavy overload simulation verification result does not exceed the preset heavy overload threshold value, determining to implement the rectification scheme; and when the simulated load capacity in the heavy overload simulation verification result exceeds the preset heavy overload threshold value, determining that the rectification scheme is not implemented.
8. The system of claim 4, wherein when the first type of power quality problem is a three-phase imbalance problem, the master station is configured to: according to the three-phase unbalance degree test formula, calculating an impedance value in the circuit topological graph to obtain a three-phase unbalance degree simulation test result; When the simulated three-phase unbalance in the three-phase unbalance simulation verification result does not exceed the preset three-phase unbalance threshold value, determining to implement the rectification scheme; And when the simulated three-phase unbalance in the three-phase unbalance simulation verification result exceeds the preset three-phase unbalance threshold value, determining that the rectification scheme is not implemented.
9. The system according to claim 6, wherein upon receipt of the second type of power quality problem, the primary station is operable to: Calculating a head end total current value of the target station area according to a head end voltage and an impedance value of a corresponding phase line, wherein the head end voltage is the head end of the target station area with the second type of electric energy quality problem; calculating an analog check voltage value of the low-voltage point according to the total current value; When the analog verification voltage value meets a voltage value preset threshold value, determining to implement the rectification scheme; And when the analog verification voltage value does not meet the voltage value preset threshold value, determining that the rectification scheme is not implemented.
10. A system according to claim 3, wherein upon receiving a plurality of said power quality data, said master station is further operable to: When the power quality types in the plurality of power quality data are identical, sequencing from high to low according to the severity of the first type of power quality problem; And establishing the work order to be checked for the first type of power quality problems with the highest severity.

Description

Power quality management system Technical Field The application relates to the technical field of power quality management, in particular to a power quality management system. Background Along with the rapid increase of urban and rural electricity demand, the low-voltage side of the distribution transformer station area frequently has the problems of heavy overload operation, three-phase load unbalance, low voltage and other electric energy quality problems in the electricity utilization peak period. The problems directly affect the normal operation of the user side electrical equipment, the service life of the equipment is shortened if the equipment is light, and the large-scale power failure accident is caused if the equipment is heavy. Because of the remarkable peak-valley fluctuation characteristic of the power load, the rectification measures are required to be repeatedly implemented to ensure the power supply quality due to the insufficient load carrying capacity of the power grid in part of areas during the load surge. The method mainly comprises the steps of adjusting the power supply range of a transformer area through load cutting, dispersing the load pressure of a heavy overload area, replacing a high-specification low-voltage wire to improve the current-carrying capacity of a circuit, and integrally replacing a distribution transformer with insufficient capacity to improve the power supply capacity. The measures need to be subjected to a plurality of links such as on-site investigation, scheme approval, material purchase, construction coordination and the like. However, the improvement of the power quality is limited by lengthy examination and approval process and construction period, and cannot be rapidly implemented in the load surge window period, so that the user bears the quality problems of low voltage and the like for a long time, and therefore, the technical problem of low improvement efficiency of the power quality exists in the prior art. Disclosure of Invention The embodiment of the application provides an electric energy quality management system which is used for achieving the technical effect of improving the electric energy quality rectifying efficiency of a power distribution network. In a first aspect, an embodiment of the present application provides a power quality management system, including: The main station is arranged at a first monitoring terminal of the target station area and a second monitoring terminal of the low-voltage down-lead of the target station area; The master station is used for updating a line topology diagram of the target station area according to the acquired correction scheme of the electric energy quality problem and sending a data acquisition instruction to the first monitoring terminal, wherein the line topology diagram is obtained after mapping is performed in advance according to a low-voltage distribution line of the target station area; the first monitoring terminal is used for sending a data acquisition instruction to the second monitoring terminal; the second monitoring terminal is used for acquiring pre-frozen electric energy data according to the data acquisition instruction and sending the electric energy data to the first monitoring terminal; The first monitoring terminal is also used for sending the electric energy data to the main station; And the master station is also used for checking the rectification scheme of the power quality problem according to the power data and the circuit topological graph so as to determine whether to implement the rectification scheme. In a possible implementation, the master station is specifically configured to: and determining whether to implement the rectification scheme or not based on the simulation verification result. In a possible implementation manner, the first monitoring terminal is further configured to send a load data value freezing instruction to the second monitoring terminal and send power quality data to the master station when the occurrence of the first type of power quality problem is monitored; The second monitoring terminal is also used for freezing the currently collected electric energy data according to the load data value freezing instruction, wherein the electric energy data at least comprises the electric energy quality type, the occurrence time and the impedance value of the current station area; The master station is also used for establishing a work order to be checked corresponding to the power quality data according to the power quality data, and determining a correction scheme of the first type of power quality problem according to the work order to be checked. In one possible implementation manner, the first type of power quality problem comprises a heavy overload problem and a three-phase imbalance problem, and the first monitoring terminal is specifically configured to: When the load capacity of the target platform area calculated according to the heavy overload checki