Method for improving microgrid energy storage primary frequency modulation performance
A technology of energy storage and micro-grid, applied in the direction of AC network circuit, AC network load balancing, single-grid parallel feeding arrangement, etc. Good FM performance and the effect of improving primary FM performance
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[0033] The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings.
[0034] like figure 1 As shown, AC photovoltaic arrays and wind turbines are called distributed power points. The photovoltaic array and energy storage unit are connected to the DC busbar through the DC-DC converter; the wind turbine is connected to the DC busbar through the AC-DC converter; the DC busbar is connected to the DC busbar through the DC-AC grid-connected inverter and step-up transformer connected to the large grid. The grid-connected inverter adopts VSG control, and cooperates with the energy storage unit to make the distributed power point have inertia characteristics.
[0035] like figure 2 As shown, the VSG control rotor mechanical equation is:
[0036]
[0037] In formula (1): J is the virtual moment of inertia; T m , T e , T d VSG mechanical torque, electromagnetic torque, damping torque; D is the damping co...
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