A control method for reactive power compensation of distributed photovoltaic power plants

Abstract

The invention discloses a reactive compensation control method for a distributed photovoltaic power station, and belongs to the field of photovoltaic power generation. The method comprises the steps:determining the actual reactive demand quantity of a property right boundary metering point of an enterprise power grid; determining a static reactive demand quantity of the distributed photovoltaic power station; determining a dynamic reactive compensation quantity according to an instantaneous fluctuation value of an enterprise load voltage and an instantaneous fluctuation value of a voltage ofthe distributed photovoltaic power station; calculating an inductive reactive demand quantity according to the charging power; determining the dynamic reactive demand quantity of the distributed photovoltaic power station according to the dynamic reactive compensation quantity and the inductive reactive demand quantity; determining the configuration information of dynamic compensation equipment and static compensation equipment according to the dynamic reactive compensation quantity and the inductive reactive demand quantity; and controlling the operation of the dynamic compensation equipmentand static compensation equipment according to the configuration information. The method solves a problem that the actual power factor does not meet the requirements after the distributed photovoltaicpower station is added. The method achieves the compensation for the reactive consumption of the distributed photovoltaic power station, and guarantees that the power factor of the property right boundary metering point of the enterprise power grid reaches the standard.

Description

technical field [0001] Embodiments of the present invention relate to the field of photovoltaic power generation, and in particular to a control method for reactive power compensation of a distributed photovoltaic power station. Background technique [0002] Loads in modern power systems include capacitive loads and inductive loads. In order to meet the requirements of power factor, corresponding compensation is required. Most electrical equipment such as transmission lines are inductive loads in most cases, and corresponding reactive power needs to be provided to such electrical equipment to reduce reactive power loss and power loss during the operation of such electrical equipment. [0003] With the development of distributed photovoltaic power stations, some enterprises will connect distributed photovoltaic power stations to the original power grid, and the reactive power compensation problems after the distributed photovoltaic power stations are connected to the original...

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Problems solved by technology

[0004] The existing power factor calculation method is the root mean square of the total active power ratio of the sum of active power and reactive power within a certain period of time. However, in the actual operation of distributed photovoltaic power plants, various Under the circumstances, the accumulated reactive power consumption is very large, and the active power consumption of the load after reducing the photovoltaic output is getting smaller, and the power factor may not meet the requirements.

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