Optimization Strategy of Hybrid Configuration for Volatility Energy Storage System in ADN
Round 1
Reviewer 1 Report
The paper is well-structured and the content is of the paper is made easy for the reader to understand.
Following points are not clear and should be reworked:
*) there is no detailed explanation of why inefficient lead-acid batteries were used for the study. Furthermore, it should be discussed to what extent the results and simulations change if the lead batteries are replaced by other energy storage systems such as Li-Ion batteries, PtG (hydrogen systems).
*) especially for photovoltaics, the load curves in figure 1 represent smoothed values. The Fluctuation of photovoltaics often takes place in intervals of less than 1 minute. Please also discuss this influence in the paper.
Author Response
*) there is no detailed explanation of why inefficient lead-acid batteries were used for the study. Furthermore, it should be discussed to what extent the results and simulations change if the lead batteries are replaced by other energy storage systems such as Li-Ion batteries, PtG (hydrogen systems).
The double-layer planning model established in this paper can fully utilize the complementary characteristics of lead-acid batteries and supercapacitors to effectively extend the service life of the system, save the cost, improve the overall performance of energy storage, and solve the problem to the greatest extent. This is demonstrated by the low frequency of lead-acid battery charging and discharging and the high frequency of supercapacitor charging and discharging [29].
Table 5. Comparison of the three battery storage costs in Scene 3 (RMB)
|
Parameters |
NaS |
Li-Ion |
|
Investment costs |
3.40e+06 |
3.75e+06 |
|
operation and maintenance costs |
249.38 |
343.32 |
|
network loss costs |
3.26 |
3.36 |
|
wind and PV operation and maintenance costs |
61.60 |
61.60 |
|
power purchase costs |
50.93 |
49.93 |
|
correction costs |
63.12 |
56.97 |
|
total costs |
3399028.28 |
3748015.17 |
To diversify the types of energy storage and broaden the scope of optimization, in addition to lead-acid batteries, other types of hybrid batteries such as Li-Ion batteries and NaS batteries were also evaluated, showing that the simulation results are different to some extent.
*) especially for photovoltaics, the load curves in figure 1 represent smoothed values. The Fluctuation of photovoltaics often takes place in intervals of less than 1 minute. Please also discuss this influence in the paper.
Currently, the fluctuation of photovoltaics often takes place in intervals of less than 1 minute, when considering how to smooth out fluctuations in PV power, control using the energy storage system's output is frequently used [30]. Typically, only the power of the HESS is used to smooth these power variations while maintaining the PV converter working in MPPT mode when PV power fluctuations do not exceed the maximum permitted power of the HESS. To put it another way, downward power fluctuations are tamed by discharging (since HESS power is positive), and upward power variations are tamed by charging (HESS power is negative). Wind power and load fluctuations follow the same pattern.
The variations in PV power throughout a minute is discussed in this paper. The power fluctuations are the interval size between the utmost and minimum power values measured at the purpose of common coupling over the course of 1 minute, as described in Fig. 1.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The manuscript written by He et al. provides the HESS capacity configuration in ADN containing volatile energy sources, this paper studies the effect of energy storage charging/discharging tactics and WG participation in frequency modulation on HESS configuration and operation, which is solved in MATLAB using a dynamic chaotic particle swarm algorithm. Through the simulation analysis of the improved case thirty-three nodes power distribution system. Hence, I would like to recommend the paper for publication after some minor revisions.
Before publication, the authors should address the following minor technical points:
1. A hybrid energy storage system with lead-acid batteries and supercapacitors is used to diversify the types of energy storage and expand the scope of optimization. To diversify the types of energy storage and broaden the scope of optimization, has any other type of hybrid system than lead-acid batteries been evaluated?
2. p11: In section 5.3.2 when talking about the three scenarios 1,2 and 3. Then in Table 3 it says scene instead of scenarios. Please put the same nomenclature. As the Table 4.
Author Response
- A hybrid energy storage system with lead-acid batteries and supercapacitors is used to diversify the types of energy storage and expand the scope of optimization. To diversify the types of energy storage and broaden the scope of optimization, has any other type of hybrid system than lead-acid batteries been evaluated?
In addition to lead-acid batteries, other types of hybrid batteries such as Li-Ion batteries and NaS batteries were also tested, demonstrating that the simulation results are rather different. This was done to diversify the forms of energy storage and widen the scope of optimization. The specific process is described in the latter part of section 5.3.1.
- p11: In section 5.3.2 when talking about the three scenarios 1, 2 and 3. Then in Table 3 it says scene instead of scenarios. Please put the same nomenclature. As the Table 4.
We have replaced all scenarios in Table 3 and the rest of the article with scene.
Author Response File: Author Response.pdf
