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Wind-power-participation real-time control method

A real-time control and wind power technology, applied in wind power generation, electrical components, circuit devices, etc., can solve the problems of increasing the AGC unit's rapid adjustment pressure and operating costs

Inactive Publication Date: 2017-12-29
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the wind power deviates greatly from the expected output within 15 minutes, and continues to climb in one direction, the planned total output and net load of the AGC unit will have a large deviation, and if the original planned value is not adjusted in time, the AGC will increase. Quick adjustment pressure and operating cost of the unit

Method used

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  • Wind-power-participation real-time control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The wind power participation real-time control method provided in this embodiment includes the following steps:

[0056] S1: Obtain the forecast value of the net load increment of the AGC unit from the dispatching center;

[0057] S2: Calculate the objective function value of the control unit of the wind farm and the AGC unit;

[0058] S3: Calculating the marginal cost target value of the control unit;

[0059] S4: Modify the system power deficit according to the marginal cost target value;

[0060] S5: Obtain the output adjustment amount and operation base point of AGC units and wind farms according to the system power shortage;

[0061] S6: Correct the operating base point and system power deficit of AGC units and wind farms;

[0062] S7: Determine whether the system power deficit is zero and whether the objective function value of each local control unit does not change; if not, return to step S1 for the next iteration, if yes, correct the operating base point of ...

Embodiment 2

[0086] The wind power participation real-time control method provided in this embodiment is a real-time control method obtained by analyzing the active power control model of the wind farm and analyzing the factors affecting the adjustment cost and adjustment margin of the system AGC unit. Two control modes: 1) The wind farm sets the operation base point according to the dispatch plan value, and reduces the output fluctuation by limiting the output; each AGC unit tracks the load with a fixed participation factor; 2) the wind-fired bundled output control mode, that is, some AGC units and Wind farm pair adjustment to increase wind power consumption; the remaining AGC units track load changes; 3) Some AGC units are paired with wind farms to increase wind power consumption while considering load changes, and the rest of AGC units follow load fluctuations; 4) The wind farm operates in the state of maximum power tracking, and conventional AGC tracks load changes. In order to minimiz...

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Abstract

The invention discloses a wind-power-participation real-time control method. The method comprises the following steps of firstly, acquiring a net load increment prediction value and a target function value of a control unit; calculating a marginal cost target value of the control unit; then modifying a system power vacancy and an operation basic point; correcting operation basic points of an AGC set and a wind power plant and the system power vacancy; finally, determining whether the system power vacancy is zero and the target function value of each local control unit is not changed; and if the system power vacancy is not zero and the target function value of each local control unit is changed, returning to a step S1 and carrying out next iteration, and if the system power vacancy is zero and the target function value of each local control unit is not changed, according to a final result, correcting the operation basic points of the wind power plant and the AGC set. By using the method of the invention, through a wind power plant and AGC set distributed cooperation real-time control model, under large scale wind power integration, real-time control is performed, and the net load increment prediction value is distributed between a conventional AGC set and the wind power plant through an equal marginal cost rule so as to reduce system operation cost and increase a system wind power consumption capability.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a real-time control method for wind power participation. Background technique [0002] At present, the error of forecasting 1 hour before the output of wind farms can reach 10%-15%. The randomness and uncertainty of wind power increase the fluctuation amplitude and rate of net load of the system, and propose new methods for real-time dispatching and automatic power generation control of power systems. requirements. As the proportion of wind power capacity in the system increases, the impact of wind power generation on the power system becomes more and more obvious. The disturbance of high wind speed will cause great changes in the voltage and frequency of the system, which may threaten the stable operation of the system in severe cases. Therefore, how to utilize wind power as much as possible and ensure the safe and stable operation of the power grid is a pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/48
CPCH02J3/381H02J3/386H02J3/48H02J2203/20Y02E10/76
Inventor 孙荣富王东升施贵荣宁文元梁吉王靖然王若阳丁然徐海翔范高锋梁志峰丁华杰王冠楠徐忱鲁宗相乔颖刘梅罗欣廖晔
Owner TSINGHUA UNIV
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