Photovoltaic power station active power control method and device

Abstract

The invention relates to a photovoltaic power station active power control method and device. The method comprises the following steps: according to active power of a sample power generation unit of aphotovoltaic power generation unit in a photovoltaic power station, determining a distribution coefficient of active power regulation amount of a controllable photovoltaic power generation unit of the photovoltaic power generation unit in the photovoltaic power station; according to deviation of active power of the photovoltaic power station, determining the total active power regulation amount of the photovoltaic power station; and according to the distribution coefficient of active power regulation amount of the controllable photovoltaic power generation unit of the photovoltaic power generation unit in the photovoltaic power station and the total active power regulation amount of the photovoltaic power station, configuring an active power reference value of the controllable photovoltaic power generation unit of the photovoltaic power generation unit in the photovoltaic power station. According to the technical scheme, the method and device can arrange active power of the controllable photovoltaic power generation unit in the photovoltaic power station more accurately and reasonably, thereby reducing regulation times of an active power control system, minimizing generation lossof the photovoltaic power station and limiting output change rate of the photovoltaic power station within the standard allowable range.

Description

technical field [0001] The invention relates to the field of new energy generation scheduling automation, in particular to a method and device for controlling the active power of a photovoltaic power station. Background technique [0002] After the photovoltaic power station is integrated into the power grid, the output instability and periodic changes caused by environmental factors such as irradiance and temperature will directly affect the power sector's power generation plan for the entire power system. With the rapid growth of photovoltaic grid-connected capacity, Its adverse effect on the stable operation of the power system is becoming more and more prominent, which brings great pressure and challenges to the dispatching and control of the power sector. In order to standardize the technical requirements for the integration of photovoltaic power stations into the power grid, the national standard "Technical Regulations for Photovoltaic Power Stations Connected to Power...

AI Technical Summary

Problems solved by technology

[0003] At present, although many photovoltaic power plants have installed active power control systems, the control accuracy of active power is not high

When distributing active power to photovoltaic inverters, the active power distribution strategy adopted by some control systems is too simple, and does not consider the differences in the specific operating conditions of different photovoltaic modules and inverters when distributing active power, such as average distribution or capacity-based Proportional distribution, etc. Some control systems use distribution strategies that ignore the losses of lines and transformers in the power station, which increases the number of adjustments in the active power control system, and some active power control systems use open-loop control. These factors cause active power The control accuracy of the power control system is not high, which may not only cause the photovoltaic power station to lose power generation and cause economic losses, but also may cause the photovoltaic power station to suffer further economic losses due to the control accuracy failing to meet the dispatching requirements.

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