Stabilizing a DC electricity network

A DC electricity network comprising:

• a DC voltage source powering electrical loads that are connected in parallel to terminals of the DC voltage source and each of the electrical loads is to receive a power setpoint;
• the DC electricity network being stabilized by regulating power setpoints applied to the electrical loads by stabilization blocks installed in non-linear regulation loops, each of the stabilization blocks configured to generate a virtual stabilization impedance for an electrical load of the electrical loads and including an input connected to means for measuring voltage at terminals of the corresponding electrical load and an output connected to a terminal for applying the power setpoint of the electrical load by a summing circuit, wherein
• the virtual stabilization impedances are dimensioned to stabilize the DC electricity network in desired operating points and in given configurations of the DC electricity network including a state in which at least one of the electrical load is inactive or has failed and a state in which stabilization of corresponding each of the electrical loads is inactive, any one of said virtual stabilization impedances being generated at the terminals of one of the electrical loads by a stabilization block of a non-linear regulation loop that acts on the power setpoint of the corresponding electrical load and generates a stabilization signal pv(t) for superposing to the power setpoint of said one of the electrical loads, the stabilization signal being so that:
• pv(t)=vs(t)·Cv·dvs/dt
• or
• pv(t)=K·vs2−X3
• where:
• vs represents a DC voltage at the terminals of said one of the electrical loads, Cv and K are parameters defining the virtual stabilization impedance, and X3 is an output signal from a filter of cutoff frequency wc that receives the signal K·vs2 as input.

A method of stabilizing a DC electricity network, the DC electricity network having a DC voltage source powering electrical loads that are connected in parallel to the terminals of the DC voltage source, each electrical load to receive a power setpoint, the method comprising:

• stabilizing the DC electricity network by regulating the power setpoints applied to the respective electrical loads by virtual stabilization impedances each generated at the terminals of each respective electrical load, the virtual stabilization impedances being dimensioned to stabilize the DC electricity network in desired operating points and in given configurations of the DC electricity network including a state in which at least one electrical load of the electrical loads is inactive or has failed and a state in which stabilization of an electrical load of the electrical loads is inactive, any one of said virtual stabilization impedances being generated at the terminals of one of said electrical loads by a stabilization block of a non-linear regulation loop that acts on the power setpoint of said one of the electrical loads and that generates a stabilization signal pv(t) for superposing to said power setpoint of said one of the electrical loads, the stabilization signal of at least one of the stabilization blocks being so that:
• pv(t)=vs(t)·Cv·dvs/dt
• and the stabilization signal of at least one of the stabilization blocks being so that:
• pv(t)=K·vs2−X3
• where vs represents a DC voltage at the terminals of said one of the electrical loads, Cv and K are parameters defining the virtual stabilization impedance, and X3 is an output signal from a filter of cutoff frequency wc that receives the signal K·vs2 as input.