# Game Approach to HDR-TS-PV Hybrid Power System Dispatching
## 2 \(Hdr\)-\(Ts\)-\(PV\) Hybrid Power System Architecture  
### Architecture of the Hybrid Power System  
Conventional \(HDR\) power stations include geothermal mining cycles and \(ORC\) generators [36]. Because the extraction of geothermal energy from artificial reservoirs established by hydraulic fracturing requires a bottom hole pressure of 30 MPa to 40 MPa and a pipeline that is 3 km to 4 km deep [37] and considering the working fluid velocity and the rock elastic modulus, the dynamic response time of the geothermal mining cycle is especially high. Although the annual utilization time can exceed 8000 h, the flexibility of _HDR_ power stations is not sufficient to fully exploit the energy storage effect of the reservoirs to provide reliable support for _PV_ plants.  
Therefore, it is necessary to design a _TS_ power station that can be coordinated with _HDR_ power stations to improve operational flexibility. The _TS_ power station comprised a thermal energy storage exchanger (_TESE_), a thermal energy storage tank, an _ORC_ generator, and an electric heating device. The heat-transfer oil (_HTO_) was used as the thermal energy storage medium. The _TS_ power station can use the _TESE_ to store the waste heat from the _HDR_ power station and convert the surplus power from _PV_ plants into thermal energy through the electric heating device.  
Conversely, conventional battery energy storage stations cannot adapt to the Qinghai plateau's cold climate, have a short cycle life, and cannot directly use geothermal energy. Nevertheless, the _TS_ power station is not affected by environmental conditions; it demonstrates the flexible operation of the battery energy storage stations and can store geothermal energy directly, making it suitable for a hybrid power system with an _HDR_ power station.  
The hybrid power system of the Gonghe Basin was considered as a test case for this research. The region has a plateau continental climate with large temperature variations and experiences rapid changes in weather conditions throughout the day. Although solar energy resources are abundant, the local loads are insufficient and require a large amount of _PV_ power to be transmitted for consumption. Therefore, the local government has formulated a policy that renewable energy power stations should be equipped with energy storage systems with a capacity of 5% to 10%. An _HDR-TS-PV_ hybrid power system architecture was constructed with a typical 200 MWp _PV_ plant equipped with an _HDR_ power station and a _TS_ power station, as shown in Figure 1.  
As Figure 1 shows, the _HDR_ power station was designed according to the temperature of the _HDR_ source, which was calculated considering the optimal working fluid flow and the power generation efficiency given in [11], and its capacity was set at 6.6 MW. The _TS_ power station was coordinated with the _HDR_ power station, whose capacity was also set at 6.6 MW. The _HDR-TS-PV_ hybrid power system improves the operational flexibility and economy of the _HDR_ power station through the adjustable _TS_ power station and simultaneously enhances the reliability of the _PV_ plant. In this hybrid power system, the _HDR_ power station, _TS_ power station, and _PV_ plant are connected to the low voltage side of the same transformer. To coordinate the operation of the three elements, this study makes the following assumptions:  
1. The _HDR_ power station is a standard double-well system [4];
2. The effects of network congestion and line capacity on the system are ignored;
3. The _TOU_ price is regulated by the power selling side.  
Figure 1: Architecture of the hybrid power system.