Node voltage calculation method and device for power system
A node voltage and power system technology, applied to circuit devices, AC network voltage adjustment, electrical components, etc., can solve problems such as poor convergence of node voltage calculations
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Embodiment 1
[0091] See figure 1 , which shows a method flowchart of a method for calculating a power system node voltage provided in the first embodiment. The method can be applied to calculate the voltage of each node in the power system, wherein the nodes include: PQ node, PV node and balance node. The power system node voltage calculation method may specifically include:
[0092] Step 101, receiving the network structure and component parameters of each node in the power system, each node at least includes: one or more PQ nodes whose active power and reactive power are known and one or more PV nodes whose active power and voltage amplitude are known ;
[0093] Specifically, the power system contains one or more PQ nodes, one or more PV nodes, and a balance node; the power system network structure and component parameters include: each branch node number, admittance, impedance, and known parameters of each node, such as PQ node active power and reactive power, PV node active power an...
Embodiment 2
[0104] See figure 2 , which shows a method flowchart of a method for calculating a power system node voltage provided in the second embodiment. This method can be applied to calculate the voltage of each node in the power system. The power system includes: one or more PQ nodes, one or more PV nodes and a balance node; where, since the balance node voltage is a known quantity, it is only necessary to calculate PQ node and PV node voltage. The power system node voltage calculation method may specifically include:
[0105] Step 201, the voltage calculation device receives the network structure and component parameters of each node in the power system, writes the power system power flow equation according to the node network structure and component parameters, and generates a PQ node iteration equation and a PV node iteration equation according to the power system power flow equation;
[0106] According to the difference of node injection conditions, network nodes can usually b...
Embodiment 3
[0227] See image 3 , which shows a device structure diagram of a power system node voltage calculation device provided in Embodiment 3, which can be used to calculate PV node and PQ node voltages in a power system. The power system node voltage calculation device may include:
[0228] The receiving module 301 is used to receive the network structure and component parameters of each node in the power system. The nodes include at least one or more PQ nodes whose active power and reactive power are known and one or more PQ nodes whose active power and voltage amplitude are known. PV node;
[0229] An iterative equation generating module 302, configured to generate a PQ node iterative equation and a PV node iterative equation according to the network structure and element parameters;
[0230] The current calculation module 303 is used to calculate the current injection amount of each node according to the preset initial value of the voltage of each node;
[0231] The active po...
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