Automatic detection of distributed energy resources system parameters
AssigneeHeila Technologies, Inc.
InventorsJorge Elizondo Martinez, Albert Tak Chun Chan, Francisco A. Morocz Bazzani
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Abstract
A method determines the topology of a DERs system having a plurality of assets, where at least one of the assets is a controllable asset. The method injects a power signal at a given frequency from a controllable asset into the DERs system. The voltage at each of the plurality of assets is measured, and the magnitude of perturbation of the voltage at the given frequency is determined for each of the plurality of assets. The method then constructs the topology of the DERs system as a function of the differences of the magnitude of perturbations of each of the plurality of assets.
Claims18
A method of estimating a physical characteristic of a network element in a distributed energy resource system having a plurality of assets electrically connected by a plurality of network elements, the method comprising:
- injecting a large power or current signal from a given controllable asset into the DERs system, the large signal having a frequency of less than 1 kHz and being greater than 10% of the power rating of the controllable asset injecting the power signal;
- measuring a voltage perturbation:
- i) magnitude, or
- ii) magnitude and phase at the given frequency,
- at two nodes in the DERs system;
- calculating the voltage drop across the network element at the given frequency as a result of the injected signal;
- estimating a physical characteristic of the network element as a function of the calculated voltage drop and the injected signal.
A system for estimating a physical characteristic of a network element in a distributed energy resource system having a plurality of assets electrically connected by a plurality of network elements, the system comprising:
- a controllable asset for injecting a large power or current signal into a DERs system, the large signal having a frequency of less than 1 kHz and being greater than 10% of the power rating of the controllable asset injecting the power signal;
- a sensor for measuring a voltage perturbation:
- i) magnitude, or
- ii) magnitude and phase at the given frequency,
- at two nodes in the DERs system;
- and
- a processor for:
- calculating the voltage drop across the network element at the given frequency as a result of the injected signal;
- and
- estimating a physical characteristic of the network element as a function of the calculated voltage drop and the injected signal.
Dependencies are inferred from the claim text.