Abstract:
A VAR dispatch system. A central control system connected to a network is configured to receive data reflecting local variations in conditions on a power grid and to transmit system control commands over the network. A plurality of VAR dispatch devices are connected to the network and to the power grid. Each VAR dispatch device is configured to detect local variations in conditions on the power grid and to transmit the data reflecting such local variations to the central control system and to receive control commands from the central control system. Each VAR dispatch device is configured to store power and to output stored power to the power grid based on local variations in conditions on the power grid. Each VAR dispatch device is further configured to output stored power to the power grid when the VAR dispatch device receives system control commands from the central control system.
Abstract:
An energy management system having a centralized site controller includes thermostats in multiple zones, each thermostat acting as a remote terminal to the controller. Each thermostat provides an interface to the site controller while acting as the thermostat for each zone. The thermostat displays the state of the building's systems for any zone and allows the local user to override set points. The central site controller determines how many thermostats are enabled with a terminal mode, including their read and write permissions on other zones. Override requests received by the central controller are merged with settings for current control algorithms. After a preconfigured time, the central controller reinstates the current control algorithm. The system can be shut down using a thermostat in remote terminal mode with appropriate permission. System status changes are sent to remote thermostats for display and remote thermostat terminals are polled for change requests.
Abstract:
An energy management system having a centralized site controller is provided with thermostats in multiple zones, each thermostat having the capability of acting as a remote terminal to the controller. Each thermostat provides an interface to the site controller while simultaneously acting as the thermostat for each zone. The thermostat can display information concerning the state of the building's lighting and HVAC systems for any zone and allow the local user to initiate local overrides of set points. In an embodiment, override requests are received by the central controller and merged with the settings for the current control algorithms.
Abstract:
Systems and methods are described for a power aggregation system. In one implementation, a method includes charging an electric resource over a power connection to an electric network, obtaining a unique identifier of a device over the power connection, and determining an electric network location of the electric resource from the unique identifier.
Abstract:
A system and method for managing power consumption and storage in a power grid. Measurements are received from a plurality of geographically distributed energy management controllers. Each energy management controllers has energy storage units with stored energy. The measurements comprise the energy production and storage capacity of the energy management controllers and their associated energy storage units. The measurements are processed, e.g., aggregated, and displayed on a graphical user interface. Commands are transmitted to a first subset of the energy management controllers to command the units to discharge their stored energy into a power grid through an inverter. Commands are transmitted to a second subset of the plurality of energy management controllers to store energy in each unit's energy storage unit.
Abstract:
Systems and methods are described for a power aggregation system. In one implementation, a method includes establishing a communication connection with each of multiple electric resources connected to a power grid, receiving an energy generation signal from a power grid operator, and controlling a number of the electric resources being charged by the power grid as a function of the energy generation signal.
Abstract:
A method assesses an energy impacting event at a facility using an energy management system. One or more energy consuming endpoints of the facility are sub-metered and data from the sub-metered endpoints is transmitted to the energy management system. A project is created within the EMS by entering project definition attributes including at least a site name, a project name, and a start date. Data from one or more sub-metered channels and a project indicator is displayed. The displayed project indicator is located at a point corresponding to its project start time. A further method tracks the progress of energy saving project at a facility using an energy management system. The project definition attributes further include one or more sub-metered channels, baseline usage data, and an energy related goal. An energy impact value is calculated by subtracting the actual sub-metered usage data from the baseline data and a determination is made whether the energy impact value meets or exceeds the energy goal. The baseline usage data, the energy goal data, the actual sub-metered data, and an indication of whether the energy goal was met are displayed. A further method tracks the financial progress of energy saving project at a facility using an energy management system. The project definition attributes further include one or more capital investment outflow values, a discount rate, and an energy cost rate. Net actual project cash flows and the net project goal cash flows are both plotted against a time scale and periodically displayed. An estimated net present value and net present value are periodically calculated and displayed.
Abstract:
Systems and methods are provided for controlling a setback mode of a power-consuming device, and for controlling setback recovery of power-consuming devices, in order to make setback and setback recovery more dynamic based on current environmental parameters and previous observed operating parameters, in order to enable more efficient operation of power-consuming devices resulting in reduced energy costs and increased power efficiency.
Abstract:
Methods for creating high quality alarms raise EMS operator awareness to abnormal conditions in monitored assets across multiple sites in a single EMS software platform. An embodiment includes steps for accessing an alarm designer software tool that contains a library of alarm definitions and the ability to create new alarm definitions, done and edit existing alarm definitions, lock alarm definitions and delete alarm definitions. Applicable data is defined using channel attributes identifying which channel or channels associated with the multiple monitored sites are to be evaluated for alarming conditions. The alarm frequency, trigger conditions, pending open duration, close conditions, and pending close duration are also defined. Alarms can trigger upon one or more channels' behavior over periods of time and conditional relationships between multiple channels. Close conditions for an alarm can be, but are not required to be, the resolution of the trigger conditions.
Abstract:
A thermostat with voltage and current sensing capability is coupled directly to an HVAC unit and provides low latency failure detection and control using an on-board CPU. The thermostat can be configured to detect failure modes using current and voltage sensing and to make autonomous decisions to control the HVAC in response to such measurements.