## 5 Case Study
### Benefit of Auxiliary Equipment  
In the above analysis, community operators have different types due to the gas boiler and energy storage. The auxiliary equipment takes an important role in the DR project. In this section, the optimal result of 3 different scenarios will be presented to compare with the above result: (a) scenario 1: community operators only have original DR resource, that is, all community operators belong to type 3; (b) scenario 2: community operators all have equipped gas boiler, that is, all community operators belong to type 1; (c) community operators all have equipped energy storage, that is, all community operators belong to type 2. In other word, the game in 3 scenarios have degenerated into complete information game. Note that, the maximal discharging energy in one time slot is 0.6 MWh for energy storage. Accordingly, the optimal results are presented as follows. Figure 6 shows the bidding amount of 3 grades of DR resource for different scenarios. From the figure, we can see that auxiliary equipment has a great influence on the bidding strategy. Specially, when community operators do not equip any auxiliary equipment, community operators can only compete for the 3 rd grade of DR resource due to the high breach amount of users. While community operators all equip energy storage, the 1 st grade of DR resource takes the main market share. Furthermore, Figure 7 shows the bidding amount of 3 community operators in each time slot for scenario 1. Comparing with the result of Figure 3, one can see that the bidding amount has all reduced in each time slot. The main reason is that, since 3 operators all take part in the bidding of the same grade of DR resource, the bidding price has reduced dramatically, but the punishment is still high. Consequently, community operators have to reduce the bidding amount to guarantee the maximization of profit in scenario 1. Based on the bidding amount, profit of 3 community operators for different scenarios can be calculated, which is presented in Table 3. In scenario 1, each player has the same profit due to the same bidding strategy and the profit is also the least in all scenarios. Comparing the results of scenario 1 and proposed scenario, it can be found that the profit of each community operator has been reduced dramatically, especially for operator 1 and 2. Although community operator 3 doesn't equip any auxiliary equipment in the two cases, its profit also has been influenced, which has been reduced about 60%. Comparing the results of scenario 2 and proposed scenario, it can be found that although community operator 1 both equipped gas boiler, the profit has been reduced to some degree. The main reason is that bidding price for the 2 nd grade of DR resource is influenced with the increasing of DR resource amount of the 2 nd grade. Similarly, the profit of community operator 2 has also been reduced comparing the results of scenario 2 and proposed scenario. According to  
Figure 5: Bidding amount of 3 grades of DR resource for different storage capacity. the above analysis, auxiliary equipment plays an important role in the aggregation of DR resource and also contributes the increase of community operators' profit. Therefore, with the promotion of proposed DR program, community operators will gradually transform to type 1 or 2 by equipping gas boiler or energy storage. However, when all market participants have equipped auxiliary equipment, their profit will be decreased in a certain degree. Figure 6: Bidding amount of 3 grades of DR resource for different scenarios. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Community Operator** & **Operator 1** & **Operator 2** & **Operator 3** \\ \hline Scenario 1 & 3.55 & 3.55 & 3.55 \\ Scenario 2 & 29.68 & 31.27 & 28.93 \\ Scenario 3 & 31.67 & 33.10 & 30.78 \\ Proposed scenario & 38.34 & 43.69 & 8.28 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Profit of 3 community operators for different scenarios (\(\times 10^{3}\) RMB).