Fracturing system
The present disclosure relates to a fracturing system comprising a functional unit, an electricity supply unit and an energy storage unit. The functional unit is configured to perform procedures of fracturing operations. The electricity supply unit is electrically connected with the functional unit and is configured to supply electrical energy to the functional unit. The energy storage unit is respectively electrically connected with the electricity supply unit and the functional unit, and is configured to store electrical energy from the electricity supply unit and supply electrical energy to the functional unit. According to the present disclosure, the energy storage unit of the fracturing system can store surplus electrical energy of the electricity supply unit and supply electrical energy to the whole fracturing system when needed, playing a role of energy storage as well as peak shaving so that the generator set and the like can maintain economic working condition for a long time, thus the system can be safe, stable, and achieve improved efficiency and economy. In addition, it is possible to generate electricity from non-carbon sources for fracturing operations and minimizes the use of internal combustion engines, which is more environment-friendly. The present disclosure can also reduce the number of generator sets and the space occupied by the generator sets so as to reduce the construction cost of fracturing operations.
1. A fracturing system comprising:
a functional unit configured to perform fracturing operations;
an electricity supply electrically connected to the functional unit;
an battery unit electrically connected respectively with the electricity supply and the functional unit, the battery unit being configured to store electrical energy from the electricity supply;
a switch cabinet, and a transformer unit and a frequency conversion unit; and
a centralized control unit which is in communication connection with the functional unit and the battery unit in a wired and/or wireless manner, and the centralized control unit is used for monitoring and/or controlling working parameters of the functional unit and the battery unit,
wherein the centralized control unit is configured to automatically control the battery unit to supply electrical energy to, the centralized control unit and the functional unit when power supply from the electricity supply is cut off from the centralized control unit and the functional unit; and
wherein the electricity supply is configured to supply power to the functional unit via the switch cabinet, and the transformer unit and the frequency conversion unit without the battery unit.
2. The fracturing system according to claim 1 , wherein the electricity supply comprises a generator set, and the battery unit is configured to supply electrical energy to the generator set.
3. The fracturing system according to claim 1 , wherein:
the battery unit is electrically connected with the functional unit via the switch cabinet, and the transformer unit and the frequency conversion unit, or
the battery unit is electrically connected with the functional unit through the transformer unit and the frequency conversion unit.
4. The fracturing system according to claim 3 , wherein the frequency conversion unit comprises a rectifier module and an inverter module, wherein the transformer unit is integrated with the rectifier module, the inverter module is integrated with a power element of the functional unit, the rectifier module is electrically connected with the inverter module via a DC bus, and the battery unit is electrically connected with the DC bus or the inverter module.
5. The fracturing system according to claim 4 , wherein a charging interface of the battery unit is electrically connected with the rectifier module.
6. The fracturing system according to claim 1 , wherein the electricity supply, the battery unit and the functional unit are electrically connected in series.
7. The fracturing system according to claim 1 , wherein the battery unit comprises a battery module, a switch, a battery management module, a charging interface and an electric supply interface.
8. The fracturing system according to claim 7 , wherein the battery unit:
further comprises an additional rectifier module electrically connected between the charging interface and the battery module, or
further comprises an additional inverter module, wherein the electric supply interface comprises an AC electric supply interface, and the additional inverter module is electrically connected between the battery module and the AC electric supply interface.
9. The fracturing system according to claim 7 , wherein the battery unit further comprises a DC/DC converter electrically connected between the charging interface and the battery module and/or between the battery module and the electric supply interface.
10. The fracturing system according to claim 7 , wherein the electric supply interface comprises a DC electric supply interface which is electrically connected with the battery module directly.
11. The fracturing system according to claim 7 , wherein the battery unit comprises a bidirectional converter, and the charging interface and the electric supply interface are electrically connected with the battery module via the bidirectional converter.
12. The fracturing system according to claim 1 , wherein the centralized control unit is configured to send out alarm information and/or reduce power consumption of the functional unit when voltage, current and/or frequency of power supply to the functional unit deviate from a predetermined range.
13. The fracturing system according to claim 1 , wherein the centralized control unit is further configured to send out prompt information including working duration information prejudged according to remaining power of the battery unit and working power of the functional unit.
14. The fracturing system according to claim 1 , wherein the centralized control unit controls the battery unit to operate in the following manner:
all of battery modules of the battery unit are charged at the same time; or all of the battery modules supply electrical energy at the same time; or some of the battery modules supply electrical energy and the others are charged.
15. The fracturing system according to claim 1 , wherein the centralized control unit is configured to cut off electrical connection for charging the battery unit when voltage, current and/or frequency for charging the battery unit deviate from a predetermined range.
16. The fracturing system according to claim 1 , wherein the battery unit is arranged on a carrier.
17. The fracturing system according to claim 1 , wherein the electricity supply comprises at least one of an electricity grid, a diesel generator set, a turbine generator set, a gas generator set, a nuclear reactor generator set, photovoltaic electricity generating equipment, a wind power plant and a fuel cell.