Coordinated control method for new energy delivery system and thermal power unit speed regulation dead zone setting
A technology for thermal power units and external delivery systems, which is applied in the direction of circuit devices, AC network circuits, reactive power adjustment/elimination/compensation, etc., and can solve problems such as increasing system operation risks
Active Publication Date: 2020-04-21
YUNNAN POWER GRID
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Problems solved by technology
[0003] The invention provides a new energy external delivery system and a thermal power unit speed regulation dead zone setting coordinated control method to solve the technical problem of increasing system operation risk due to the fluctuation of new energy output in the prior art
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[0024] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of means consistent with aspects of the invention as recited in the appended claims.
[0025] Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.
[0026] Please refer to figure 1 , which is a schematic structural diagram of a new energy delivery system provided in an embodiment of the present invention.
[0027] Depend on fig...
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The invention provides a new energy delivery system and a thermal power unit speed-adjusting dead zone setting coordinated control method. The system comprises a new energy sending circuit, a VSC (voltage source converter), an LCC (line commutated converter), a thermal power unit and a loading center, wherein the new energy sending circuit and the thermal power unit are in grid connection with the LCC; the VSC is connected between a far end of the new energy sending circuit and the LCC; the LCC is connected with the loading center. As for a new energy and thermal power bundled direct-current delivery system, new energy is connected to an alternating current bus of an LCC through inversion by a VSC inverter to provide the alternating current bus with local reactive power compensation after being collected by the aid of direct current, and influences on stable operation of the thermal power unit are reduced. On one hand, existing thermal power foundation direct-current long-distance delivery lines are sufficiently utilized, on the other hand, fluctuant new energy output is taken as support for conventional direct-current delivery by use of the flexibility of a flexible direct-current power transmission system VSC.
Description
technical field [0001] The present invention relates to the field of new energy transmission, in particular to a new energy delivery system and a coordinated control method for setting speed regulation dead zones of thermal power units. Background technique [0002] When large-scale wind power is connected to the grid based on LCC-HVDC, the LCC-HVDC at the sending end is regarded as a passive load. If there is no AC voltage source support at the grid-connected point, the LCC converter may not commutate normally. For this reason, The research unit of the company proposed the idea of bundling and sending new energy and thermal power, and configured a certain synchronous thermal power unit in the sending end grid to provide synchronous support to realize the effective sending of new energy. However, the use of this scheme has certain limitations, especially the need to deploy a large amount of thermal power in the new energy base, that is, while developing new energy, the loc...
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IPC IPC(8): H02J3/38H02J3/18
CPCH02J3/18H02J3/38H02J2203/20Y02E40/30
Inventor 游广增李琰钱迎春李玲芳迟永宁刘超李常刚何宇婷
Owner YUNNAN POWER GRID