Photovoltaic and air condition load coordination optimization power distribution network voltage control method

Abstract

The present invention discloses a photovoltaic and air condition load coordination optimization power distribution network voltage control method. The method comprises: a power distribution network obtains sensitivity information of each node through load flow calculation; each photovoltaic and air condition load user reports a price-regulation model according to the benefit itself; when the power distribution network has the voltage problems such as voltage off-limit or voltage too-low, a voltage integrated controller takes regulation cost as a target according to the model of each node user and the sensitivity of the nodes to establish a target function to determine the compensation price for each user; and each user regulates active or reactive power itself according to the obtained compensation price so as to realize voltage control. The photovoltaic and air condition load coordination optimization power distribution network voltage control method fully utilizes the regulation capacity of the air condition load, coordinates with the reactive regulation of a photovoltaic inverter, considers the power grid, air condition users and photovoltaic benefit, reduce discarding, improve the renewable energy utilization rate and provides reference for solving the voltage problem of a distributed photovoltaic access power distribution network.

Description

technical field [0001] The invention relates to the technical field of electric power control, in particular to a distribution network voltage control method for coordinated optimization of photovoltaic and air-conditioning loads. Background technique [0002] With the increasingly prominent energy and environmental issues, the integration of distributed power sources such as photovoltaics and wind power into distribution networks has become an important trend in the development of distribution networks. Distributed photovoltaic access to the distribution network can achieve local energy balance, avoiding the investment and loss of long-distance power transmission. At the same time, the access of clean and renewable photovoltaic power can replace traditional fossil energy and improve the energy structure. Due to the randomness and volatility of the output power of photovoltaic power sources, the access of a large number of distributed photovoltaics also brings power quality...

AI Technical Summary

Problems solved by technology

[0003] When the photovoltaic output is high and the load is small, the voltage limit problem is prone to occur

When the photovoltaic output is insufficient and the load is large, the problem of low voltage will occur. The traditional solution is generally concentrated on the power supply side to adjust the reactive power of the photovoltaic inverter and install reactive power compensation equipment such as reactors. Use energy storage and other equipment to absorb excess photovoltaic power or compensate for the power deficit when photovoltaic output is insufficient, and take the method of cutting off part of the active output, that is, "abandoning light" when necessary

In the above scheme, due to the limitation of power factor, adjusting the reactive power of the inverter has a limited effect on voltage regulation; adding reactive power compensation equipment and energy storage equipment will inevitably bring additional investment; "abandoning light" reduces the renewable energy. Utilization of

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