Cross-regional power delivery multi-energy complementary optimization method and device

Abstract

The embodiment of the invention provides a cross-regional power delivery multi-energy complementary optimization method and device, and belongs to the field of power technology. The cross-regional power delivery multi-energy completement optimizing method comprises the following steps: calculating performance evaluation indexes at different moments according to wind power delivery power, photovoltaic delivery power and hydropower delivery power of a delivery end power grid at different moments, as well as wind power acceptable power, photovoltaic acceptable power and hydropower acceptable power of a receiving end power grid at different moments; and calculating the power-on start/stop manner of a thermal power generating unit according to the performance evaluation indexes at different moments. The power demand of the receiving end power grid is taken into consideration, and optimal scheduling of cross-regional wind power, hydropower, photovoltaic and thermal power is realized, so thatan optimization scheme is provided for the delivery consumption of cross-regional clean energy, and the power consumption cost of power grid enterprises is lowered.

Description

technical field [0001] The embodiments of the present invention relate to the field of electric power technology, and in particular to a multi-energy complementary optimization method and device for cross-regional power transmission. Background technique [0002] At present, both wind power and photovoltaic power generation have strong randomness, volatility and intermittency, which will have a serious negative impact on all parties involved in cross-regional power transmission. On the one hand, due to the uncertainty of clean energy, the sending-end grid cannot provide stable and reliable power according to the needs of the receiving-end grid; on the other hand, due to the uncertainty of wind power and photovoltaics, the sending-end grid tends to regard it as As "garbage" power, that is, power that is not conducive to grid dispatching arrangements, power grid companies are not willing to accept this type of energy without major interests or driven by mandatory policies. In...

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Problems solved by technology

[0002] At present, both wind power and photovoltaic power generation have strong randomness, volatility and intermittency, which will have a serious negative impact on all parties involved in cross-regional power transmission

On the one hand, due to the uncertainty of clean energy, the sending-end grid cannot provide stable and reliable power according to the needs of the receiving-end grid; on the other hand, due to the uncertainty of wind power and photovoltaics, the sending-end grid tends to regard it as As "garbage" power, that is, power that is not conducive to power grid dispatching arrangements, power grid companies are not willing to accept this type of energy without major interests or driven by mandatory policies

In related technologies, it is usually to build a certain proportion of thermal power enterprises at the power transmission end to make up for the power shortage, but this is relatively expensive

Alternatively, the power transmission grid realizes the stable transmission of energy output through the multi-energy complementarity of wind, water and fire, and the receiving-end grid first consumes the clean energy in the region within its power supply range according to its load characteristics, and then arranges the thermal power units in the region and those outside the region. Clean energy, but this only focuses on local multi-energy complementarity, without considering the complementary characteristics of wind, water, fire and its relationship with load characteristics in a wider range, so that it is impossible to achieve multi-energy complementary large-scale optimization

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