METHOD FOR CONTROLLING A LOAD

• US 20160380431A1
• Filed: 06/23/2016
• Published: 12/29/2016
• Est. Priority Date: 06/23/2015
• Status: Active Grant

• Current Assignee: SMA Solar Technology AG
• Original Assignee: SMA Solar Technology AG
• Inventors: Buenemann, Mathias, Schropp, Bernhard, Groene, Matthias
• Granted Patent: US 10,103,543 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06Q 10/04 Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" market predictions or forecasting for commercial activities G06Q30/0202
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 50/10 Energy trading, including energy flowing from end-user application to grid

Abstract

A method for controlling a load by providing a total energy consumption and a time window for the total energy consumption of the load from one or more energy sources is described. The method includes determining of energy blocks, wherein the energy blocks are based on a power interval during a time interval, the time intervals are within the time window and the energy blocks are allocated energy-source-dependent costs, sorting of the energy blocks in ascending order according to the level of the costs per energy block and subsequent summation of quantities of energy that the energy blocks contain in ascending order of sorting until the total energy consumption of the load is reached. From this, on and off times of the load are determined by means of the time intervals that belong to the summed energy blocks, wherein the power intervals belonging to the respective energy blocks determine a power consumption of the load at the respective instant, and the load is actuated in accordance with the on and off times. An apparatus for carrying out the method is likewise disclosed.

Claims

1. A method for controlling a load, comprising:

providing a total energy consumption of the load and a time window for the total energy consumption of the load from one or more energy sources,

determining energy blocks, wherein the energy blocks are based on a power interval during a time interval, and wherein the time intervals are within the time window, and

wherein the energy blocks are allocated energy-source-dependent costs,

sorting the energy blocks in ascending order according to a level of the cost per energy block,

summating quantities of energy that the energy blocks contain in ascending order of sorting until the total energy consumption of the load is reached,

determining on and off times of the load using the time intervals that belong to the summed energy blocks, wherein the power intervals belonging to the respective energy blocks determine a power consumption of the load at the respective instant, and

actuating the load in accordance with the determined on and off times.

2. The method according to claim 1, wherein in the case of loads with discrete power consumption levels, the latter determine the power intervals.

3. The method according to claim 1, wherein a quantity of energy blocks that is obtained from at least one renewable energy source is determined by using a forecast.

4. The method according to claim 3, wherein in the case of loads with a continuously variable power consumption, the power intervals are determined by a power of the renewable energy source in the associated time interval.

5. The method according to claim 3, wherein when an upper supply limit is applied, the energy blocks that are obtained from the at least one renewable energy source and that exceed the upper supply limit in accordance with the forecast are assigned the lowest costs.

6. The method according to claim 1, wherein the costs of the energy blocks are determined by taking into account the consequential environmental costs of the energy producers producing them.

7. The method according to claim 1, wherein the time intervals are determined as equal-sized portions of the time window.

8. An apparatus for controlling a load, comprising

a first interface configured to output control commands to the load,

a second interface configured to receive operating data from at least one renewable energy source and send control commands to the at least one renewable energy source,

a third interface configured to receive a forecast by means of which a quantity of energy blocks that can be obtained from the renewable energy source is determined, or further configured to receive data for preparing a forecast,

wherein the apparatus is configured to:

provide a total energy consumption of the load and a time window for the total energy consumption of the load from one or more energy sources,

determine energy blocks, wherein the energy blocks are based on a power interval during a time interval, and wherein the time intervals are within the time window, and

wherein the energy blocks are allocated energy-source-dependent costs,

sort the energy blocks in ascending order according to a level of the cost per energy block,

summate quantities of energy that the energy blocks contain in ascending order of sorting until the total energy consumption of the load is reached,

determine on and off times of the load using the time intervals that belong to the summed energy blocks, wherein the power intervals belonging to the respective energy blocks determine a power consumption of the load at the respective instant, and

actuate the load in accordance with the determined on and off times.