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Wind power load reduction considering power system robust reserve optimization method

An optimization method and power system technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems that affect the economics of wind power grid-connected dispatching and unfavorable sustainable development of wind power

Inactive Publication Date: 2018-05-08
ZHEJIANG UNIV
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Problems solved by technology

With the increase of wind power penetration rate, the required traditional reserve capacity increases, which seriously affects the economics of wind power grid-connected dispatching, and is not conducive to the sustainable development of wind power

Method used

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  • Wind power load reduction considering power system robust reserve optimization method
  • Wind power load reduction considering power system robust reserve optimization method
  • Wind power load reduction considering power system robust reserve optimization method

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specific Embodiment

[0134] Taking an improved New England 10-machine 39-node system as an example, the system wiring diagram is as follows figure 1 shown. Based on the specification of wind power forecasting function, with 15 minutes as the scheduling interval, a total of 24 scheduling periods from 0 to 6h are evaluated at t=0h. The parameters of thermal power units G1-G7 and wind farms W1-W3 are shown in Table 1 and Table 2.

[0135] Table 1 Parameters of thermal power units

[0136]

[0137] Table 2 Wind farm parameters

[0138]

[0139] The power of each load node and the proportion of the total load are given in Table 3, and the load deviation data are also given in the table.

[0140] Table 3 system injection load ratio

[0141]

[0142] Described step 1) quantify the backup capacity of each wind farm with the load reduction ratio K as follows:

[0143] Wind turbines can run under load for a long time (De-loading) to provide appropriate backup for the system, such as figure ...

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Abstract

The invention discloses a wind power load reduction considering power system robust reserve optimization method. The method comprises the steps of firstly quantitatively measuring the reserve capacityof each wind power farm by using a load reduction ratio; further building a wind power load reduction considering system robust reserve scheduling optimization model; then obtaining a relaxed robustoptimization model by using a linear relaxation technology; then converting the linear robust optimization model into an equivalent deterministic linear programming model by using a duality principle;and finally solving the wind power load reduction considering system robust reserve scheduling optimization problem by using a space branch-and-bound solving model. The uncertainty of wind power output is processed by using distribution information independent robust optimization by combining active control assistant frequency modulation services of the wind power farms in allusion to a reserve problem brought about by operations of a large-scale wind power access system. Compared with the traditional system reserve scheduling method, the method disclosed by the invention can adjust the robustness and economy of a reserve scheme. In addition, compared with an MPPT mode, the wind power load reduction considering control can reduce the pressure of the traditional reserve.

Description

technical field [0001] The invention relates to a robust backup optimization method for a power system, in particular to a robust backup optimization method for a power system considering wind power load reduction. Background technique [0002] With the rapid development of wind power, its intermittent, fluctuating and anti-peaking characteristics have become increasingly prominent, and have gradually become the main factors restricting large-scale grid integration of wind power. In the power system, the accuracy of load forecasting is high, and the uncertainty caused by its error has little influence. However, at the current technical level, the forecasting accuracy of wind power power is much lower than that of load forecasting. Deterministic scheduling methods present challenges. On the other hand, with the rapid development of wind turbine active power control technology, some wind turbines have been able to participate in different levels of system frequency regulation...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46
CPCH02J3/386H02J3/46H02J2203/20Y02E10/76
Inventor 汪震林峰周昌平
Owner ZHEJIANG UNIV
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