CN108876036A - A kind of regulation optimization method about transmission line of electricity separated time critical point electricity abnormal problem - Google Patents

Abstract

The present invention relates to a rectification and optimization method for the problem of abnormal electricity at branch points of transmission lines. On the basis of researching the investigation mechanism for abnormal electricity at branch points of transmission lines in the State Grid, a data model for monthly electricity at branch points is established. The SCADA system of the State Grid acquires the monthly average daily power of the sub-line gates, which can quickly and accurately calculate the monthly power value of each sub-line gate, effectively avoiding the impact of power outage calibration and measurement CT ratio, and saving a lot of manpower and material resources , which can effectively promote the improvement of the standard rate of transmission line split line loss.

Description

A rectification and optimization method for the problem of abnormal electricity at the branch point of the transmission line

technical field

The invention relates to the field of troubleshooting of transmission lines, in particular to a rectification and optimization method for the problem of abnormal electricity at branch points of transmission lines.

Background technique

The main problem encountered by the State Grid Corporation in the process of improving the line loss compliance rate of 35 kV and above sub-lines is that it is very difficult to rectify the abnormal input and output power.

The 35 kV and above sub-line loss model involves many gates. When the input and output power are abnormal, it is necessary to check the power of the relevant gates one by one, but there is a lack of fast and effective calibration methods. The usual idea is to inquire about equipment files, and arrange operators to check the metering secondary circuit and meter on site, and check the position of the metering CT tap in a power failure, check its actual transformation ratio, and analyze whether the cause of the abnormality is the open circuit or short circuit of the metering secondary circuit. , Meter failure, measurement CT ratio error, etc. It is extremely time-consuming and laborious, and the efficiency is low, which seriously affects the efficiency of rectification.

In view of these circumstances, based on the results provided by the State Grid dispatching SCADA system, a set of data analysis models based on the monthly average of the daily average power of the gate is established to realize the rapid investigation of the power status of the transmission line branch gate, which will greatly save the transmission line branch. Labor and time costs for abnormal analysis of gateway electricity.

Contents of the invention

In view of this, the purpose of the present invention is to propose a method for rectifying and optimizing the problem of abnormal power at the branch point of the transmission line, based on the results provided by the national grid dispatching SCADA system, a set of monthly averages of the daily average power of the point is established to establish data Analyzing the model to realize the rapid investigation of the power situation at the branch point of the transmission line will greatly save the labor and time costs of abnormal analysis of the power at the branch point of the transmission line.

The present invention is realized by adopting the following scheme: a rectification and optimization method for the problem of abnormal electricity at the branch point of the transmission line, which specifically includes the following steps:

Step S1: Obtain the monthly average of the daily average power of the gateway from the State Grid dispatching SCADA system;

Step S2: Establish a data model for the calculation of the monthly power at the sub-line gate, and obtain the monthly power at the gate by solving the data model for the calculation of the monthly power at the sub-line gate;

Step S3: Comparing the monthly electricity obtained from the solution in step S2 with the electricity collected by the electricity consumption information collection system of power users, and then analyzing whether the branch gate of the transmission line is abnormal.

Further, the data model for the calculation of the monthly power at the sub-line gateway in step S2 is:

Monthly power at the gateway = monthly average of daily average power × 24 × number of days in this month × 1000;

Among them, the unit of the gateway monthly electricity is kilowatt-hour.

Further, step S1 also includes: verifying the correctness of the monthly average of the daily average power through the bus power balance of the SCADA system.

Compared with the prior art, the present invention has the following beneficial effects: the present invention is based on the abnormal investigation mechanism of the sub-gate power of the national grid transmission line, aims at improving the power calculation efficiency of the sub-line gate, and proposes to use the daily average power of the gate The monthly average value is used to calculate the monthly power at the sub-line gate, which effectively avoids power failures and checks the measurement CT ratio, saving a lot of manpower and material resources. It has greatly promoted the improvement of the line loss compliance rate of the transmission line sub-line, and the effect is very remarkable.

Description of drawings

Fig. 1 is a schematic diagram of the analysis process of the embodiment of the present invention.

Fig. 2 is a schematic diagram of the method for extracting the monthly average value of the daily average power at the gateway according to the embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

This embodiment provides a rectification and optimization method for the problem of abnormal power at the branch point of the transmission line, which specifically includes the following steps:

Step S1: Obtain the monthly average of the daily average power of the gateway from the State Grid dispatching SCADA system;

Step S2: Establish a data model for the calculation of the monthly power at the sub-line gate, and obtain the monthly power at the gate by solving the data model for the calculation of the monthly power at the sub-line gate;

Step S3: Comparing the monthly electricity obtained from the solution in step S2 with the electricity collected by the electricity consumption information collection system of power users, and then analyzing whether the branch gate of the transmission line is abnormal.

In this embodiment, the data model for the calculation of the monthly power at the sub-line gateway in step S2 is:

Monthly power at the gateway = monthly average of daily average power × 24 × number of days in this month × 1000;

Among them, the unit of the gateway monthly electricity is kilowatt-hour.

In this embodiment, step S1 further includes: verifying the correctness of the monthly average of the daily average power through the bus power balance of the SCADA system.

As shown in Figure 1, in this implementation, the national grid dispatching SCADA system is used to obtain the monthly average of the daily average power of the gate, so as to quickly solve the specific process of obtaining the power consumption of the sub-line gate as follows:

a) Enter the dispatching SCADA system, find the switch corresponding to the gate, and select its active power curve, as shown in Figure 2;

b) Select "monthly" as the statistical period, "daily average" as the statistical object, and display the extreme value to obtain the monthly average of the daily average power of the gate;

c) Based on the average monthly power at the gate = monthly average of daily average power x 24 x days of the month x 1000 (unit: kWh), calculate the monthly power at the gate for comparison;

d) The transformation ratio of the metering CT has a fixed series, and its taps have a fixed configuration, so the regularity is relatively strong. By analyzing the above-mentioned heterogeneous power data, it is easy to identify the error of the metering CT transformation ratio, which is reflected in the fact that the ratio of the two is usually It is 1.2, 1.33, 1.5, 2.0, etc.; if the ratio is irregular or there is a huge difference between the two, it is generally a short circuit, open circuit or meter failure of the metering secondary circuit.

e) The correctness of the monthly average of the daily average power at the gateway can be verified by the bus power balance of the SCADA system.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (3)

1. A method for rectifying and optimizing the problem of anomalous electric quantity at branch points of transmission lines, characterized in that: comprising the following steps: Step S1: Obtain the monthly average of the daily average power of the gateway from the State Grid dispatching SCADA system; Step S2: Establish a data model for the calculation of the monthly power at the sub-line gate, and obtain the monthly power at the gate by solving the data model for the calculation of the monthly power at the sub-line gate; Step S3: Comparing the monthly electricity obtained from the solution in step S2 with the electricity collected by the electricity consumption information collection system of power users, and then analyzing whether the branch gate of the transmission line is abnormal. 2. A method for rectifying and optimizing the problem of abnormal electric quantity at branch points of transmission lines according to claim 1, characterized in that: the data model for calculating the monthly electricity at branch points in step S2 is: Monthly power at the gateway = monthly average of daily average power × 24 × number of days in this month × 1000; Among them, the unit of the gateway monthly electricity is kilowatt-hour. 3. A method for rectifying and optimizing the problem of abnormal power at the branch point of the transmission line according to claim 1, characterized in that: step S1 also includes: verifying the monthly average value of the daily average power through the bus power balance of the SCADA system correctness.