A day-ahead power generation planning method considering multi-terminal flexibility
A power generation planning, flexible and straight technology, applied in circuit devices, AC network circuits, single-network parallel feeding arrangements, etc., to achieve the effect of low computational intensity, improved intelligence level and decision-making ability, and strong adaptability
Active Publication Date: 2020-08-14
NARI TECH CO LTD +3
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Problems solved by technology
In my country, this technology has been in the theoretical research stage for many years, and a large number of demonstration projects have just begun to be built in recent years, but there are few studies on the application of flexible straightening in active power dispatching.
[0005] For the multi-terminal flexible DC-AC hybrid transmission system with large-scale renewable energy feed-in, the traditional active power dispatching control method cannot better adapt to the random fluctuation of renewable energy
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[0047] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0048] Such as figure 1 As shown, a day-ahead power generation planning method considering multi-terminal flexibility includes the following steps:
[0049] Step 1. Determine the dispatch cycle that needs to be optimized for power generation plan, and obtain the optimized parameters in the dispatch cycle; the optimized parameters in the dispatch cycle include adjustable unit parameters, multi-terminal flexible direct operation mode and control mode.
[0050] Step 2, considering the load balance constraints of the AC grid system, the output power constraints of the adjustable units, the load addition and reduction rate constraints of the adjustable units, the branch power flow constraints, the a...
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The invention discloses a day-ahead generation scheduling method considering multi-end flexible direct current. Minimum power generation cost of a conventional energy unit and maximum new energy consumption are taken as targets, an adjustable unit power output plan and a multi-end flexible direct current connecting line plan are optimized, and the two sub-problems of optimization calculation and security correction are subjected to interactive iterative solution, so that an adjustable unit power output plan and a multi-end flexible direct current connecting line plan meeting network security are obtained; safe introduction of new energy power generation is ensured; and the intelligence level and decision capability of power generation scheduling after introduction of wind-light new energy are improved. Meanwhile, the method has the characteristics of low calculation intensity and high adaptability, and is more suitable to be popularized and applied to new energy receiving-end grid scheduling organizations in China.
Description
technical field [0001] The invention relates to a method for preparing a day-ahead power generation plan considering multi-terminal flexibility, and belongs to the technical field of power system scheduling automation. Background technique [0002] Affected by the geographical distribution of resources and loads, China's renewable energy utilization is dominated by "large-scale development and long-distance transmission". Due to the strong volatility and uncontrollability of renewable energy, it brings technical challenges to the development and utilization. In order to solve the problem of "delivery" of large-scale high-density renewable energy, my country has begun to try to solve this problem through flexible DC with flexible modulation capabilities. [0003] "Flexible HVDC" is the DC transmission technology using voltage source converter (voltage sourced converter, VSC). ABB company calls it HVDC Light, and Siemens company registers it as HVDC Plus. In my country, it is...
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IPC IPC(8): H02J3/46
CPCH02J3/46H02J2203/20
Inventor 谢丽荣滕贤亮丁恰于德明杜延菱刘海涛刘娅琳
Owner NARI TECH CO LTD