Energy storage type flexible interconnection cooperative control power distribution system
A technology for collaborative control and power distribution systems, applied in electrical components, circuit devices, AC network circuits, etc., to reduce operating costs, improve stability, and improve efficiency.
Pending Publication Date: 2022-06-10
JIANGSU ELECTRIC POWER CO +2
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Problems solved by technology
[0004] In order to solve the problems of low efficiency and high operating cost when using flexible interconnection technology to maintain the stability of distribution network in the prior art, this application discloses an energy storage type flexible Interconnected collaborative control power distribution system
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[0046] The first inverter and the second inverter are three-phase four-leg inverters; the midpoints of the fourth bridge arms in the first inverter and the second inverter are respectively passed through The filter inductor is connected to the midpoint of the load.
[0047] The three-dimensional space vector pulse width modulation method is used to suppress the negative-sequence and zero-sequence components caused by the three-phase unbalance of the distribution network.
[0048] The system is also used for harmonic compensation optimization. The system is externally connected with a parallel active power filter, and the parallel active power filter performs harmonic compensation for the distribution network. A parallel active power filter (APF) is used to compensate the harmonics of the flexible interconnection device. After the instantaneous reactive power is measured by the detection device, the system harmonic current is extracted, and the reference command current is tra...
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The invention discloses an energy storage type flexible interconnection cooperative control power distribution system. The system comprises an energy storage device, a bidirectional DC-DC converter, a first inverter and a second inverter. The energy storage device is connected with the bidirectional DC-DC converter, the bidirectional DC-DC converter is connected with the first inverter and the second inverter, and the first inverter is connected to a first power distribution network through a first feeder line; the second inverter is connected to a second power distribution network through a second feeder line; the system is used for controlling power balance of the power distribution network through power mutual assistance. When the connection between the power distribution network and the system is disconnected, voltage sag support is carried out; when the power distribution network is connected with an unbalanced load, three-phase unbalance compensation is carried out; and harmonic compensation optimization is carried out. According to the invention, through cooperation of the devices, comprehensive allocation of the power distribution network electric energy is realized, and the efficiency of power distribution network regulation and control is improved; harmonic suppression is provided, the overall operation cost of the power distribution network is reduced, and the operation stability of the power distribution network is improved.
Description
technical field [0001] The application relates to the technical field of flexible interconnection and distribution network, in particular to an energy storage type flexible interconnection collaborative control distribution system. Background technique [0002] At present, with the increasing population of our country and the development of new energy power generation and energy Internet technology, a large number of fast, low inertia, high frequency power electronic systems are widely connected to low speed, large inertia, power frequency power systems, and the power system is increasingly showing high With the characteristics of new energy, high proportion of power electronics, and high proportion of incoming electricity from outside the region, sustainable development has become the trend of future power grid development. However, the access of these new power sources has caused many risks to the safe and stable operation of the power system, and power quality problems hav...
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IPC IPC(8): H02J3/32H02J3/26H02J3/01H02J3/00
CPCH02J3/32H02J3/26H02J3/01H02J3/0073
Inventor 史明明张宸宇葛雪峰付慧李双伟刘建刘瑞煌苏伟司鑫尧费骏韬缪惠宇吴凡潘益
Owner JIANGSU ELECTRIC POWER CO