Abstract

Runoff, electricity price, and load are the main random variables in the cascade hydropower spot market. The inter-influence, intertwining and coupling relationship among the three increase the difficulty of power market operation. For this reason, this study first used the system dynamics method to draw the causal circuit diagram of the correlation between power station runoff, discharge price and full network load in the spot market, revealed the correlation mechanism of the three, and analyzed the correlation between the three based on the actual data of the spot market. The results show that there is a significant correlation between the three variables. The price of clearing electricity is positively correlated with the load of the whole network, the correlation coefficient is as high as 0.5238, and the price of clearing electricity is negatively correlated with the reservoir runoff, showing a certain degree of complementarity.

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