Power generation system and power generation method for supplying power to power grid

Abstract

The embodiment of the invention provides a power generation system and power generation method for supplying power to a power grid. The power generation system comprises at least two power generator sets and an energy storage sub-system, wherein the at least two power generator sets are connected in parallel and both are electrically connected with the power grid, a control switch is arranged between the energy storage sub-system and a signal output end of each power generator set so as to control connection or disconnection between the energy storage sub-system and the signal output end of the power generator set, and the energy storage sub-system is configured to be in a way that one of the control switches is switched on, the other control switches are switched off, and a compensation power is output by the energy storage sub-system to compensate a difference value between a target output power and an actual output power of the power generator set corresponding to the control switch which is switched on currently. With the power generation system provided by the embodiment of the invention, the combined running time of the energy storage sub-system and the power generator sets can be effectively prolonged, so that the utilization ratio of the energy storage sub-system is greatly improved, and meanwhile, the problem that an error is easy to occur during calculating a plurality of compensation powers also can be reliably prevented.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a power generation system and a power generation method for power grids. Background technique [0002] Such as figure 1 As shown, the existing power generation system for supplying power to the grid usually includes: an energy storage subsystem 1 and a generator set 2 connected in parallel with the energy storage subsystem 1. The energy storage subsystem 1 and the generator set 2 can jointly respond to the dispatching instructions of the grid. In order to realize the complementary advantages of the energy storage subsystem 1 and the generator set 2, so as to provide more high-quality and efficient regulation services for the power grid. [0003] In the actual operation process, due to various reasons, the joint operation time of the energy storage subsystem 1 and the generator set 2 is often short. The above reasons will be described below by taking the case where the g...

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Problems solved by technology

[0004] On the one hand, the thermal power unit needs to be maintained and overhauled once a year, and each maintenance and overhaul takes two to six weeks. In this way, when the thermal power unit is being maintained and overhauled, both the thermal power unit and the energy storage subsystem 1 are obviously cannot run jointly

[0005] On the other hand, when some components in the thermal power unit, such as boilers or steam turbines, etc. break down, these components need to be repaired, and the time required for the maintenance operation is generally longer. In the process of implementing the maintenance operation, the thermal power unit and energy storage subsystem 1 obviously cannot work together

[0006] Obviously, the above reasons will greatly shorten the joint operation time of the energy storage subsystem 1 and the generator set 2, so that the utilization rate of the energy storage subsystem 1 will also be greatly reduced

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