Bigwood Technology, Inc. Patent applications |
Patent application number | Title | Published |
20150039663 | TRUST-TECH ENHANCED METHODS FOR SOLVING MIXED-INTEGER OPTIMIZATION PROBLEMS - A dynamical method and system generate a global optimal solution to a mixed integer nonlinear programming (MINLP) problem, where a part or all of optimization variables of the MINLP problem are restricted to have discrete values. The method computes a first integer solution to the MINLP problem with a given starting point using an MINLP solver; computes a set of stable equilibrium points (SEPs) of a nonlinear dynamical system associated with a relaxed continuous problem of the MINLP problem, where the SEPs surround the first integer solution and form one or more tiers; identifies from the SEPs a set of new starting points for the MINLP problem; computes integer solutions to the MINLP problem with progressively tightened bounds, starting from the new starting points using the MINLP solver; and generates the global optimal solution based on the integer solutions after one or more iterations. | 02-05-2015 |
20140257767 | PSO-Guided Trust-Tech Methods for Global Unconstrained Optimization - A method determines a global optimum of a system defined by a plurality of nonlinear equations. The method includes applying a heuristic methodology to cluster a plurality of particles into at least one group for the plurality of nonlinear equations. The method also includes selecting a center point and a plurality of top points from the particles in each group and applying a local method starting from the center point and top points for each group to find a local optimum for each group in a tier-by-tier manner. The method further includes applying a TRUST-TECH methodology to each local optimum to find a set of tier-1 optima and identifying a best solution among the local optima and the tier-1 optima as the global optimum. In some embodiments, the heuristic methodology is a particle swarm optimization methodology. | 09-11-2014 |
20140257715 | Robust Power Flow Methodologies for Distribution Networks with Distributed Generators - A method predicts power flow in a distributed generation network of at least one distributed generator and at least one co-generator, where the network is defined by a plurality of network nonlinear equations. The method includes applying an iterative method to the plurality of network nonlinear equations to achieve a divergence from a power flow solution to the plurality of network nonlinear equations. The method also includes applying the iterative method to find a first solution to a plurality of simplified nonlinear equations homotopically related by parameterized power flow equations to the plurality of network nonlinear equations. The method further includes iteratively applying the iterative method to the parameterized power flow equations starting with the first solution to achieve the power flow solution to the plurality of network nonlinear equations. | 09-11-2014 |
20140244189 | System For Achieving Real-Time Monitoring and State Estimation in Power Distribution Networks - A method of placing PMUs for distribution networks having a plurality of nodes, the network comprising: a feeder line attached to a source at a source node and at least one node with a lateral branching from the node on the feeder line, the method comprising the steps of: placing a VPMU and CPMU directly after the source node; locating a next node downstream along the feeder line; and for the located next node, determining a type of node located, a type of line between the source node and the located next node and whether the located next node is an end node of the feeder line; wherein if the located next node is branching node, placing a CPMU on all laterals between the branching node and an end of the lateral; determining if any of the located next nodes are attached to a dispersed generator and placing a CPMU. | 08-28-2014 |
20130218494 | Systems for Real-Time Available Transfer Capability Determination of Large Scale Power Systems - A system for accurately determining real-time Available Transfer Capability and the required ancillary service of large-scale interconnected power systems in an open-access transmission environment, subject to static and dynamic security constraints of a list of credible contingencies, including line thermal limits, bus voltage limits, voltage stability (steady-state stability) constraints, and transient stability constraints. | 08-22-2013 |