Transformer replacement electric quantity saving single-side measurement method based on root mean square
A technology for saving electricity and measuring methods, applied in measuring devices, measuring electrical variables, instruments, etc., can solve problems such as inappropriate energy-saving renovation projects, achieve good economic benefits and practical value, rigorous theoretical derivation, and simplify the measurement process.
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Embodiment 1
[0031] (1) Overview of the embodiment;
[0032]In this embodiment, the transformer replacement project is divided into high-efficiency transformer equal-capacity replacement and high-efficiency transformer capacity-increasing replacement, so as to solve the problems of high transformer loss and insufficient transformer capacity. Taking S15 and S13 transformers of equal capacity to replace S7 transformers as an example, calculate the power saved after the replacement of transformers with equal capacity. The original S7 transformer operates at a load rate of 0.5, and the load remains unchanged after the transformer is replaced. The main technical parameters of the transformer are shown in Table 1.
[0033]
[0034] Table 1
[0035] (2) Calculation of power saving;
[0036] Steps such as figure 1 As shown, first determine the project boundaries (such as figure 2 shown), the base period, project statistical period, and typical work cycle are all taken as 720 hours. Instal...
Embodiment 2
[0056] (1) Overview of the embodiment;
[0057] In this embodiment, the transformer replacement item is equal-capacity replacement of high-efficiency transformers, and S7-type transformers are replaced with S13-type transformers of equal capacity to solve the problem of high transformer loss. The main technical parameters of the transformer are shown in Table 1. The method based on the average current and the method based on the root mean square in the present invention are respectively used to calculate the electricity saving after replacement. The operating voltage of the transformer is near the rated voltage, and the current per unit value in one day is shown in Table 3. Table 3 is a table of the per unit current of the transformer for 24 hours a day.
[0058] time / h
0
1
2
3
4
5
6
7
Current / p.u.
0.35
0.2
0.15
0.14
0.15
0.18
0.25
0.5
time / h
8
9
10
11
12
13
14
15
Current / p.u...
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