Power system dispatching method based on flexible direct current transmission and pumped storage power station energy storage

Abstract

The invention proposes a power system scheduling method based on flexible direct current transmission and pumped storage power station energy storage, which belongs to the technical field of power system operation control. This method is suitable for power systems including flexible direct transmission systems and pumped storage power stations. By establishing and solving the optimal dispatching model of power systems based on flexible direct current transmission and pumped storage power stations composed of objective functions and constraints, the pumped storage The ability to store energy, adjust unstable new energy output, stabilize the fluctuation of new energy power generation, make the power flowing into the load center appear in a stable ladder shape, and obtain the optimal dispatching plan. The invention considers the fluctuation of renewable energy in the power system, and utilizes the advantages of flexible direct current transmission to enable the load center to receive high-quality and stable power, reduce the regulation pressure of thermal power on the fluctuation of new energy, and improve the regulation efficiency of the power system. Flexibility ensures the security of the power system, and is suitable for scenarios such as rolling dispatch of the power system.

Description

technical field [0001] The invention belongs to the technical field of power system operation control, and specifically proposes a power system scheduling method based on flexible direct current transmission and pumped storage power station energy storage. Background technique [0002] The dispatching of the power system plays an important guiding role in the operation of the power system. It is responsible for formulating the output plan of the generator set, and achieving optimal operation under the premise of meeting the power load and ensuring the safety of the power system. In recent years, more and more wind power has been connected to the power system, and the output of wind power is fluctuating. Therefore, the pump-storage pair can be used to stabilize the fluctuation of wind power and reduce the regulation load of thermal power units. At the same time, for systems fed by large-scale renewable energy, the traditional active power control method does not consider soft...

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Problems solved by technology

At the same time, for systems fed by large-scale renewable energy, the traditional active power control method does not consider soft, direct and flexible modulation, and the traditional deterministic method cannot better adapt to the strong random fluctuation of large-scale high-density renewable energy, and cannot guarantee reliable consumption

[0003] In the current flexible DC transmission system of the power system, the pumped storage power station is not considered to stabilize the fluctuation of wind power, which will increase the regulation load of the traditional unit and increase the regulation cost

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