It does, sometimes, causing electricity price to go negative. This summer our local Hydro dam was full. But instead of generating electricity at full capacity

It does, sometimes, causing electricity price to go negative. This summer our local Hydro dam was full. But instead of generating electricity at full capacity they had to open the overflow valves because it was windy and the local wind farm was producing at full capacity and the transmission lines does not have capacity to handle both wind and hydro at full capacity. Our price was hovering around 0 all summer.