Energy storage converter-based microgrid grid-connected control system and method
An energy storage converter and control method technology, applied in AC network circuits, AC network load balancing, AC network to reduce harmonics/ripples and other directions, can solve the problems of increasing line loss, affecting the safe operation of loads, etc. The effect of improving power quality and good dynamic performance
Active Publication Date: 2019-09-20
ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +2
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Problems solved by technology
Compared with the traditional power grid, the main characteristics of the microgrid are the randomness and intermittent nature of distributed power sources such as wind and light, and the harmonic and reactive current in the microgrid under the influence of load nonlinearity, unbalanced mutation, etc. It will not only affect the safe operation of the internally connected distributed power system and load, but also increase the line loss
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Embodiment 2
[0116] This embodiment provides an electronic device, including a memory, a processor, and computer instructions stored in the memory and run on the processor. When the computer instructions are executed by the processor, the steps of the method in the first embodiment are completed. .
Embodiment 3
[0118] This embodiment provides a computer-readable storage medium for storing computer instructions, and when the computer instructions are executed by a processor, the steps of the method in the first embodiment are completed.
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The invention proposes an energy storage converter-based microgrid grid-connected control system and method. The energy storage converter-based microgrid grid-connected control method comprises the steps of rapidly detecting a negative-sequence current, harmonic and a reactive current of a power grid by virtual sine and cosine functions; and achieving power output control by a proportional resonant controller, performing divided-frequency compensation control on the grid-connected current reactive power and the harmonic of a microgrid according to system margin, and performing multi-target control on an energy storage converter. By the energy storage converter-based microgrid grid-connected control method, the grid-connected current compensation and balance of the microgrid can be achieved, and the electric energy quality of the microgrid is improved; and meanwhile, the proportional resonant controller is complicated to design control parameter, on-line setting of a proportional resonant parameter is performed by combining a fuzzy algorithm, so that the system has relatively good dynamic performance.
Description
technical field [0001] The present disclosure relates to the technical field related to power quality control, and specifically relates to a microgrid grid-connected control system and method based on an energy storage converter. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Microgrid is a concept relative to the traditional large power grid. It refers to a network composed of multiple distributed power sources and their related loads according to a certain topology, and is connected to the conventional power grid through static switches. The development and extension of microgrids can fully promote the large-scale access of distributed power sources and renewable energy, and realize the highly reliable supply of various energy forms for loads. Smart grid transition. The proposal of microgrid aims to realize the flexible and efficien...
Claims
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Login to View More IPC IPC(8): H02J3/38H02J3/32H02J3/01H02J3/18
CPCH02J3/382H02J3/01H02J3/18H02J3/32Y02E40/30Y02E40/40
Inventor 高春辉吴冠宇王达周皓肖冰史昌明邱桂中秘立鹏孙睿章小卫
Owner ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER