Patent•
Distributed energy storage system of wind power station
12 Sep 2012-
TL;DR: In this article, the utility model relates to a distributed energy storage system of a wind power station, which consists of a centralized conventional capacity wind generation set, a distributed conventional capacity renewable energy storage set and a plurality of wind driven generators.
Abstract: The utility model relates to a distributed energy storage system of a wind power station. The energy storage system comprises a centralized conventional capacity wind generation set, a distributed conventional capacity wind generation set, a high capacity wind generation set, a plurality of boosting transformers, a main transformer, a plurality of energy storage devices, a power grid and a superior power grid. After being connected in parallel, the centralized conventional capacity wind generation set and a plurality of wind driven generators are connected with the low voltage sides of the boosting transformers and the energy storage devices; after the distributed conventional capacity wind generation set, the plurality of wind driven generators and a branch circuit formed by series connection of the boosting transformers are connected in parallel, the distributed conventional capacity wind generation set, the plurality of wind driven generators and the branch circuit are connected with a busbar of the wind power station and the energy storage devices; the high capacity wind generation set is connected with the energy storage devices and the low voltage sides of the boosting transformers; and the busbar of the wind power station is connected with the low voltage side of the main transformer, the energy storage devices and the high voltage sides of the boosting transformer. According to the utility model, the energy storage devices with different capacities can be distributed according to the actual condition of the wind power station and are stably and reliably connected into the power grid.
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Patent•
24 Jun 2014
TL;DR: In this paper, the authors proposed a method for storing electric energy in electrochemical energy accumulators and for exchanging electric energy with an electric energy distribution network via a power electronic system connecting the EC accumulators with the electric distribution network.
Abstract: In a method for storing electric energy in electrochemical energy accumulators and for exchanging electric energy with an electric energy distribution network via a power electronic system connecting the electrochemical energy accumulators with the electric energy distribution network the specific data and features of the electrochemical energy accumulators 2.1 - 2 .N and the topology of the power electronic system 4.1 - 4 .N; 31 .M; 31 .N, 32 .N are transferred into data and features specific for the electric energy distribution network 11 . A corresponding apparatus contains at least one base module or AC batteries 1.1 - 1 .N with DC batteries 2.1 - 2 .N having the same chemical and/or physical properties, a battery management system 20.1 - 20 .N controlling and monitoring the DC batteries 2.1 - 2 .N, a power electronic module 4.1 - 4 .N, 31 .N, 32 .N, a power electronic module control means 40.1 - 40 .N and an AC battery management 5.1 - 5 .N with communication interfaces 15 to the battery management system 20.1 - 20 .N.
2 citations
Patent•
30 May 2014
TL;DR: In this article, a bi-directional storing inverter in a grid connected power system, comprising of a transformer connected between the output end of a bidirectional inverter circuit and a switching circuit, is described.
Abstract: A bi-directional storing inverter in a grid connected power system, comprising: a transformer connected between the output end of a bi-directional inverter circuit and a switching circuit; at least two bi-directional inverter circuit in parallel; the input ends of the two bi-directional inverter circuits (1, 2) respectively connecting to a storage battery, the output ends of them respectively connecting to the different windings of the transformer primary side, and the transformer secondary side connecting to the switch circuit; when the public power grid disconnects and a grid connected inverter is reconnected, if the produced power is more than the needs of the load, a sampling control circuit will control one of the bi-directional inverter circuits working in the inverter state to keep the grid based a grid connected inverter, and another bi-directional inverter circuit working in the rectification state; the excess electricity is stored in the storage battery, and there is no need to limit the output power of the grid connected inverter, which avoids the unnecessary waste of the energy.
2 citations
Patent•
03 Jul 2018
TL;DR: In this paper, a measurement and control device, system and method for a wind power plant is described, which consists of a first communication interface, a second communication interface and a processor board card.
Abstract: The invention discloses a measurement and control device, system and method for a wind power plant The device comprises a first communication interface, a second communication interface and a processor board card The processor board card is connected with the first communication interface and the second communication interface; and the processor board card receives a frequency modulation instruction issued by a grid scheduling server through the first communication interface, receives operation information of a wind power generator through the second communication interface, calculates a first frequency modulation capacity of the wind power generator under the condition of not inputting a first energy storage battery based on the operation information of the wind power generator, and when the first frequency modulation capacity of the wind power generator meets the frequency modulation instruction, sends the frequency modulation instruction to the wind power generator and does not start the first energy storage battery When wind speed meets the frequency modulation requirements, the measurement and control device, system and method can utilize frequency modulation capability ofthe wind power generator itself to output continuous and stable voltage, and can complete the frequency modulation task successfully, so that not only frequency modulation reliability can be improved,but also battery energy can be saved
1 citations
Patent•
03 May 2016
TL;DR: In this paper, the authors proposed a method for controlling the stability of a local network consisting of a plurality of outgoing circuits (41, 42,..., 4M), each having at least one load (5) and/or one decentralised energy generation system (6).
Abstract: The invention relates to a device (1) and a method for controlling the stability of a local network (3). The local network (3) comprises a plurality of outgoing circuits (41, 42,..., 4M,), each having at least one load (5) and/or at least one decentralised energy generation system (6). Said device is provided with an on-load tap-changer (14) for adjusting an output voltage of the local network transformer (10). The device is characterised in that a unit (16) for measuring current, connected to at least one of the plurality of outgoing circuits (41, 42,..., 4M,), and a unit (18) for measuring voltage, connected to a busbar (8) of the local network (3), are arranged in a transformer housing (20).
1 citations