# US 2004/0070280 A1 · Output suppressing method of a plurality of dispersed power sources and dispersed power source managing system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2004/0070280 A1 - Document ID: US20040070280A1 - Status: Published application - Kind: A1 - Application number: 10/680,212 - Filed: 2003-10-08 - Published: 2004-04-15 - Earliest claimed: 2002-10-11 - Assignees: Sharp Kabushiki Kaisha - Inventors: Hirofumi Nakata; Mitsuo Okamoto - Web page: https://patentgrep.com/patent/US20040070280A1 ## CPC - H02J 3/32: using batteries or super capacitors with converting means - H02J 3/46: Controlling the sharing of generated power between the generators, sources or networks - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract Regarding output suppression control of a plurality of dispersed power sources linked to a high-voltage-to-low-voltage transformer of a commercial power system, the partiality of the output suppression of a plurality of dispersed power sources is eliminated and, cost increase of the dispersed power sources is prevented. If a voltage at a power receiving point of a dispersed power source 1a exceeds the upper limit of a proper value, then a power conditioner 4 suppresses an output to a power receiving point to store a surplus power into a storage battery 8 and transmit an output suppression start signal to a management unit 9. The management unit 9 transmits an output suppression command signal to the other dispersed power sources 1b through 1e of which the voltage at the power receiving point is not exceeding the upper limit of the proper value to make the other dispersed power sources 1b through 1e to suppress their outputs and store surplus power into storage batteries 8. The plurality of dispersed power sources 1a through 1e can be thus made to impartially suppress the outputs, so that the capacity of the storage batteries 8 can be reduced. ## Claims ### Claim 1 An output suppressing method of a plurality of dispersed power sources comprising: suppressing an output of a dispersed power source when a voltage at a power receiving point of the dispersed power source among the plurality of dispersed power sources linked to a high-voltage-to-low-voltage transformer of a commercial power system exceeds an upper limit of a proper value; and further suppressing outputs of the other dispersed power sources of which the voltages at power receiving points do not exceed the upper limit of the proper value. ### Claim 2 (depends on 1) The output suppressing method of the plurality of dispersed power sources as claimed in claim 1, comprising the steps of: determining whether or not the voltage at the power receiving point of each of the plurality of dispersed power sources exceeds the upper limit of the proper value; suppressing the output of the dispersed power source of which the voltage at the power receiving point exceeds the upper limit of the proper value and transmitting an output suppression start signal from the dispersed power source to a management unit; transmitting an output suppression command signal from the management unit that has received the output suppression start signal to the dispersed power sources other than the dispersed power source that has transmitted the output suppression start signal; and suppressing the output of the dispersed power source that has received the output suppression command signal. ### Claim 3 (depends on 2) The output suppressing method of the plurality of dispersed power sources as claimed in claim 2, comprising the steps of: canceling control of the output suppression of the dispersed power source that has transmitted the output suppression start signal, by the dispersed power source itself when the voltage at the power receiving point of the dispersed power source becomes equal to or lower than the upper limit of the proper value and transmitting an output suppression cancel signal to the management unit; transmitting an output suppression cancel command signal from the management unit that has received the output suppression cancel signal to the dispersed power sources other than the dispersed power source that has transmitted the output suppression cancel signal; and canceling the suppression of the output of the dispersed power source that has received the output suppression cancel command signal. ### Claim 4 (depends on 1) The output suppressing method of the plurality of dispersed power sources as claimed in claim 1, wherein each of the dispersed power sources comprises a storage battery, stores a suppression power corresponding to the suppressed part into the storage battery inside the dispersed power source and gradually increases the suppression power to be stored. ### Claim 5 A dispersed power source managing system comprising: a plurality of dispersed power sources linked to a high-voltage-to-low-voltage transformer of a commercial power system; and a management unit for managing the plurality of dispersed power sources; wherein the dispersed power sources each comprises: a DC power source; a transformation means for transforming a DC power from the DC power source into an AC power and outputting the AC power; a storage battery; a voltage detection means for detecting a voltage at a power receiving point; an output suppressing means for suppressing the AC power to be supplied to the power receiving point when the voltage at the power receiving point exceeds an upper limit of a proper value and supplying an electric power to the storage battery; an output suppression canceling means for canceling the output suppression by the output suppressing means when the voltage at the power receiving point becomes equal to or lower than the upper limit of the proper value; a transmission means for transmitting an output suppression start signal and an output suppression cancel signal to the management unit on the basis of outputs of the output suppressing means and the output suppression canceling means; and a reception means for receiving an output suppression command signal and an output suppression cancel command signal for operating the output suppressing means and the output suppression canceling means from the management unit, and wherein the management unit comprises: a reception means for receiving the output suppression start signal and the output suppression cancel signal from each of the dispersed power sources and a transmission means for transmitting the output suppression command signal and the output suppression cancel command signal to each of the dispersed power sources. ### Claim 6 (depends on 5) The dispersed power source managing system as claimed in claim 5, wherein the dispersed power sources each comprises a rectification means for rectifying an AC power from the transformation means and forming a DC power, and the suppression power corresponding to the part suppressed by the output suppressing means is transformed from the AC power to a DC power by the rectification means and stored into the storage battery. ### Claim 7 (depends on 5) The dispersed power source managing system as claimed in claim 5, wherein the DC power source is a solar battery.