Intelligent electric meter operation error monitoring method combined with line loss analysis
A smart meter and combined line technology, applied in the measurement of electrical variables, measuring devices, instruments, etc., can solve the problems of low management efficiency, large workload, and high cost of manpower vehicles, so as to ensure accuracy and overcome the problems of heavy workload. Effect
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Embodiment 1
[0043]A smart meter operation error monitoring method combined with line loss analysis, see figure 1 , the method includes the following steps:
[0044] 101: Set the error control threshold of the smart meter based on the operation specification of the digital electric energy meter and the category to which the smart meter belongs;
[0045] Among them, due to the different types of electronic smart meters and different application subjects, the definitions of error estimation parameters are slightly different. This embodiment provides mainly for residential users. [9]-[10] Based on the adjustment. Under normal circumstances, the error monitoring threshold of smart meters for ordinary residential users is 2%, and the error monitoring threshold for special users is 0.5%.
[0046] 102: Obtain the correlation between the calibration table (general table) of the station area and the user's electric energy measurement data in the station area within any measurement period, as well...
Embodiment 2
[0052] Below in combination with specific calculation formulas and examples, the scheme in Embodiment 1 is further introduced, see the following description for details:
[0053] For step 102: Obtain the correlation between the calibration table (general table) of the station area and the user power measurement data in the station area, as well as the power loss of the distribution line in any measurement period, and construct an intelligent system combined with line loss analysis. The electric meter operation error estimation model specifically includes the following steps, see Figure 4 .
[0054] (1) For any unit measurement period, the relationship between the total power supply of the total smart meter in the station area, the total power consumption of users and the sum of line power loss is as follows:
[0055]
[0056] In the formula, y feeder It is the power supply of the general smart meter in the station area during the measurement period of any unit; Indicat...
Embodiment 3
[0116] Combined with specific calculation examples, calculation formulas, Figure 6 , Figure 7 And table 1 carries out feasibility verification to the control method proposed in embodiment 1, see the following description for details:
[0117] 1. Use the program-controlled load simulation system in the low-voltage distribution station area to simulate the actual power distribution situation, and use the revised joint estimation model to estimate the loss rate of the distribution line according to the collected operating data and the relevant data of the power equipment used in the experiment, and From this, the daily line loss rate of the station area is calculated, and the estimated result is as follows Figure 6 Shown:
[0118] The estimation results show that the distribution line loss rate estimation using the revised joint estimation model has high accuracy. Through the analysis of the coupling relationship between the accuracy of the smart meter operation error and th...
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