Micro-grid operation method for stabilizing fluctuation of wind and light power by energy storing device
An energy storage device and power fluctuation technology, applied in the field of smart microgrid, can solve the problems of output power fluctuation, affecting the stable operation of microgrid, random intermittence, etc., and achieve the effect of stabilizing power fluctuation
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specific Embodiment approach 1
[0016] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the microgrid operation method using energy storage devices to stabilize wind and solar power fluctuations described in this embodiment, the specific process of this method is:
[0017] Step 1. Determine the structural parameters and operating parameters of the microgrid according to the microgrid system;
[0018] Step 2: Select the active output of each distributed power source in the microgrid system and the power of the microgrid to purchase and sell electricity from the large grid as control variables, obtain the operating cost function of the microgrid according to the control variables, and use the operating cost function as the operating cost of the microgrid the objective function;
[0019] Step 3. According to the objective function obtained in step 2, obtain the mathematical model of the energy storage device for smoothing the fluctuation of wind and rain;
[0020]...
specific Embodiment approach 2
[0022] Specific implementation mode 2: This implementation mode further explains the implementation mode 1. The operating cost of the microgrid described in step 2 includes fuel costs, pollution discharge costs, operation and maintenance costs, and large power grid purchase and sale costs. The operating cost is expressed as an objective function as :
[0023] F = Σ T = 1 M [ Σ i = 1 N ( C OP ( P Gi ) + C ES ( P Gi ) + C OM ...
specific Embodiment approach 3
[0025] Specific implementation mode three: this implementation mode further explains implementation mode one, and the mathematical model of the energy storage device obtained according to the objective function in step three is:
[0026] | P py ( t ) - P py ( t - 1 ) | ≤ S · λ
[0027] P ess (t)=P py (t)-P max (t)
[0028] Where: P py (t) represents the output power after being stabilized at time t; P py (t-1) indicates the output power of wind power after being stabilized at time t-1; P max (t) represents the maximum output power output at time t; P ess (t) represents the charging and discharging power of the energy storage device; S stands for
[0029] Indicates the installed capacity; λ indicates the m...
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