Maintaining transaction security in a distributed system and the distributed system. The distributed system comprises an online system, an offline system, and a removable storage device. The online system comprises online sub-systems in communication via a communications network, each storing an online ledger. The offline system is unconnected to the network and the online system and comprises an offline sub-system storing an offline ledger. The removable storage device stores a copy of the online ledger. In operation, the copy of the online ledger is accessed when the device is connected to the offline sub-system; upon determining that the copy of the online ledger and the offline ledger are versions of the same ledger the offline ledger is updated with reference to the online ledger thereby achieving synchronisation between the offline ledger and the online ledger.

A method for operating a power generating facility connected to a power distribution grid having an uncertain power generation condition includes predicting a probabilistic power flow forecast in a transmission line of the power distribution grid for a period of time, wherein the transmission line is electrically coupled to the power generating facility, predicting, using the probabilistic power flow forecast, a probability of congestion over the transmission line of the power distribution grid during the period of time, generating a mitigation plan, including a load adjustment on the transmission line, using the probability of congestion predicted over the transmission line and a thermal limit constraint of the transmission line, wherein the mitigation plan balances load adjustment and an overlimit line capacity on the transmission line, and controlling the power generating facility, using the mitigation plan, to achieve load modification and mitigate the probability of congestion predicted in the transmission line.

A system for distributing locally generated energy from at least one renewable DC source to a plurality of local load units of the system, including, for each load unit: an input terminal configured to connect to a grid, and an output terminal configured to connect to at least one load. Further for each load the system includes an inverter including an inverter input and an inverter output, wherein the inverter input is connected to the at least one renewable DC source and the inverter output is connected to the input terminal and to the output terminal of the respective load unit, and wherein the inverter is configured to convert a direct current at the inverter input into an alternating current at the inverter output. The system also includes a power meter including a power meter input connected to the input terminal of the respective load unit, wherein the power meter is configured to determine a current power consumption from the grid, and wherein the power meter includes a power meter output connected to the inverter of the respective load unit, and wherein the power meter is configured to transmit data relating to the current power consumption from the grid to the inverter. The inverter of the respective load unit is configured to determine an input DC voltage applied to its inverter input and to determine a power to be currently converted from the applied input DC voltage and the current power consumption data transmitted thereto.

A method for assisting control of an electrical supply grid) or a portion thereof is provided. The method includes recording system states of the grid and/or influencing the grid, transmitting the states to a central evaluation and/or control unit and/or between other subscribers, including wind turbines and/or wind farms that supply the grid, for use in controlling their supply to the grid. The method includes controlling the grid on the basis of the transmitted states. Fundamentally identical states are simultaneously recorded at multiple recording locations associated with the grid and the recording of at least one of the states at a respective recording location is performed by a turbine and/or farm and the turbine or farm recording a state at one recording location and the turbine or farm recording a state at another recording location are independent at least such that they supply to the grid at different points.

Waveforms in power grids typically reveal a certain pattern with specific features and peculiarities driven by the system operating conditions, internal and external uncertainties, etc. This prompts an observation of different types of waveforms at the measurement points (substations). An innovative next-generation smart sensor technology includes a measurement unit embedded with sophisticated analytics for power grid online surveillance and situational awareness. The smart sensor brings additional levels of smartness into the existing phasor measurement units (PMUs) and intelligent electronic devices (IEDs). It unlocks the full potential of advanced signal processing and machine learning for online power grid monitoring in a distributed paradigm. Within the smart sensor are several interconnected units for signal acquisition, feature extraction, machine learning-based event detection, and a suite of multiple measurement algorithms where the best-fit algorithm is selected in real-time based on the detected operating condition. Embedding such analytics within the sensors and closer to where the data is generated, the distributed intelligence mechanism mitigates the potential risks to communication failures and latencies, as well as malicious cyber threats, which would otherwise compromise the trustworthiness of the end-use applications in distant control centers. The smart sensor achieves a promising classification accuracy on multiple classes of prevailing conditions in the power grid and accordingly improves the measurement quality across the power grid.

A method for enrolling a device in a secure network to which an information system is connected, the method comprising the steps, implemented by a trusted device connected to the secure network, of: a) receiving from a user terminal, distinct from the device to be enrolled, an authorization to connect to the device to be enrolled, b) generating cryptographic keys intended for the device to be enrolled to access the secure network, and c) transmitting the cryptographic keys to the device to be enrolled.

The present disclosure provides a method for obtaining site data from a power plant within a private network of the power plant, where the power plant comprises one or more wind turbine generators. The method comprises a step of providing at an internal computer system placed internally with respect to the private network site data relating to the power plant, where the site data is in a site data format. The site date is stored in the internal computer system, and pushes to an external data interface outside the private network. The site data is transformed to a universal data format being different from the site data format before or after pushing the site data.

The disclosure provides a method for planning a power distribution network, an apparatus for planning a power distribution network, and a storage medium. The method includes: establishing a model for planning the power distribution network, the model including a target function and constraints, the target function for minimizing a cost of the power distribution network when branches and nodes are installed into the power distribution network, the nodes including transformers and substations, the constraints including a power balance constraint of the power distribution network, a power constraint of the branches, a power constraint of the transformers, a radial operation constraint of the power distribution network, a fault constraint, a calculation constraint of indices of a reliability, a constraint of the indices of the reliability, and a logic constraint; and solving the model to determine whether the branches and the nodes are installed into the power distribution network.

Novel tools and techniques are provided for implementing customer resource telemetry and use as a service. In various embodiments, a computing system might receive, from a user, a request to access at least one network-accessible resource associated with a customer of a service provider, the user being unassociated and unrelated with the customer; might identify at least one of a user identification, a company, or a class of user associated with the user; might determine whether at least one resource record associated with the customer indicates that the user has permission to access the at least one network-accessible resource, based on the identification. If so, the computing system might provide the user with access to the at least one network-accessible resource associated with the customer. If not, the computing system might deny, to the user, access to the at least one network-accessible resource associated with the customer.

This invention is directed to systems and methods that track a specified stored energy level profile for a BESS in a microgrid. The systems and methods including using a control algorithm that tracks the stored energy level profile for the BESS. The controller algorithm includes a Kalman Filter design for a model-based state reconstruction to overcome sensor/communication errors during real-time operation. The latter is important to guarantee the ability of the microgrid to continue its seamless operation during periods of erroneous sensor measurements or flawed communication.