Corresponding-period grid-connection simulation platform and simulation system of pumped power storage unit under different working conditions

Abstract

The invention discloses a corresponding-period grid-connection simulation platform and simulation system of a pumped power storage unit under the different working conditions. A simulation function is provided for corresponding-period grid-connection research of the pumped power storage unit. The corresponding-period grid-connection simulation platform comprises a pumped power storage unit module, an infinite power grid module, a stationary frequency converter, a back-to-back starting unit module, a main transformer module, an SFC output transformer module, a step-down transformer, a corresponding-period adjusting module, an excitation control module, a water turbine speed regulation module, a back-to-back starting speed regulation module, a grid-connection circuit breaker module, a starting circuit breaker module, a first voltage monitoring module, a second voltage monitoring module, a rotation speed detection module and a monitoring system module. Simulation models of the pumped power storage unit under the different working conditions can be established by combining and adjusting functional modules, and a grid-connection simulation function of the pumped power storage unit under multiple operating working conditions including generator working conditions, water pump working condition back-to-back starting, water pump working conditions, SFC starting and the like and multiple starting modes can be achieved.

Description

technical field [0001] The invention relates to the field of power equipment simulation, in particular to a synchronous grid-connected simulation platform and a simulation system for pumped storage units under different working conditions. Background technique [0002] The pumped storage power station has multiple operating conditions such as power generation and water pumping. Through the conversion between the working conditions, the pumped storage power station can realize many important functions such as peak and valley filling, frequency modulation and phase modulation, and voltage adjustment. Pumped storage Various operating conditions of the power station require grid-connected operation with the power system, but pumped storage units have different requirements for synchronous grid-connected operation under different operating conditions. [0003] Grid connection of pumped storage units is a very important operation, and the operation is relatively frequent. A certa...

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Problems solved by technology

A certain inrush current will be generated during the grid connection process. If the inrush current is too large, it will not only cause the generator-transformer protection device to malfunction, resulting in grid connection failure, but also the

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