CN-122000936-A - Multi-time-scale cooperative frequency modulation control method for wind-fire bundling and sending system

CN122000936ACN 122000936 ACN122000936 ACN 122000936ACN-122000936-A

Abstract

The invention relates to the field of wind-fire bundling and delivering systems, in particular to a multi-time-scale cooperative frequency modulation control method of a wind-fire bundling and delivering system. The method comprises the steps of obtaining wind-fire available up-regulation capability and wind-fire available down-regulation capability based on obtained real-time operation data, further combining the obtained real-time operation data, obtaining a coordinated frequency modulation urgency index in an up-regulation direction and a coordinated frequency modulation urgency index in a down-regulation direction through a coordinated frequency modulation urgency evaluation algorithm, then automatically generating a frequency modulation power instruction of wind power and thermal power when the frequency of a bus at a transmitting end deviates from a rated frequency through a wind-fire coordinated frequency modulation self-adaptive control algorithm based on the coordinated frequency modulation urgency index in the up-regulation direction and the coordinated frequency modulation urgency index in the down-regulation direction, and not triggering the coordinated frequency modulation instruction when the frequency of the bus at the transmitting end is equal to the rated frequency. The method solves the technical problems that the adjustment is difficult to be carried out corresponding to different frequency states, the current callable frequency modulation resource cannot be truly reflected, and unreasonable frequency modulation distribution is easy to occur.

Inventors

WANG XINWEI
ZHAI YUJIA
WANG ZEYU
LI HE
DUAN JIANDONG
Ren Wancheng
WANG HAILONG
CAO DONGZHENG
CHEN ZHONGYANG

Assignees

国网内蒙古东部电力有限公司通辽供电公司
国家电网有限公司
哈尔滨工业大学

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (9)

1. A multi-time scale cooperative frequency modulation control method of a wind-fire bundling and sending system is characterized by comprising the following steps of: S1, acquiring real-time operation data, wherein the real-time operation data comprise a sending end bus frequency, a rated frequency, a frequency change rate, an outgoing actual measurement power, an outgoing plan power, wind power up-regulation available power, wind power down-regulation available power, a data reporting period of a synchronous phasor measurement device, a thermal power unit speed regulation execution period, a thermal power up-regulation up-climbing rate and a thermal power down-regulation up-climbing rate, multiplying the thermal power unit speed regulation execution period by the thermal power up-regulation up-climbing rate and the thermal power down-regulation up-climbing rate respectively, and then obtaining wind power up-regulation available power and wind power down-regulation available power by combining the wind power up-regulation available power and the wind power down-regulation available power; S2, automatically generating a frequency modulation power instruction of wind power and thermal power when the frequency of the bus at the sending end deviates from the rated frequency through a wind-fire cooperative frequency modulation self-adaptive control algorithm based on the cooperative frequency modulation urgency index in the up-regulation direction and the cooperative frequency modulation urgency index in the down-regulation direction, and not triggering the cooperative frequency modulation instruction when the frequency of the bus at the sending end is equal to the rated frequency.
2. The multi-time scale cooperative frequency modulation control method of a fire-wind bundling and delivery system according to claim 1, wherein the S1 specifically comprises: In the cooperative frequency modulation urgency assessment algorithm, directivity recognition and decomposition are performed based on the busbar frequency of the transmitting end, the rated frequency, the frequency change rate, the actually-transmitted power and the planned transmitted power, and low-frequency deviation, high-frequency deviation, negative frequency change rate, positive frequency change rate, transmitted power shortage and transmitted power excess are calculated.
3. The multi-time scale cooperative frequency modulation control method of the wind-fire bundling and delivery system according to claim 2, wherein the S1 specifically comprises: The power urgent item in the up-regulating direction is obtained by dividing the surplus power by the available up-regulating capability of wind fire, and the power urgent item in the down-regulating direction is obtained by dividing the surplus power by the available down-regulating capability of wind fire.
4. The multi-time scale cooperative frequency modulation control method of the wind-fire bundling and delivery system according to claim 2, wherein the S1 specifically comprises: The method comprises the steps of combining a low frequency deviation with a negative frequency change rate to obtain an up-regulation frequency urgent item, combining a high frequency deviation with a positive frequency change rate to obtain a down-regulation frequency urgent item, and respectively carrying out normalization processing on the up-regulation frequency urgent item and the down-regulation frequency urgent item to obtain an up-regulation frequency urgent item and a down-regulation frequency urgent item.
5. The multi-time scale cooperative frequency modulation control method of a fire-wind bundling and delivery system according to claim 4, wherein the step S1 specifically comprises: and superposing the normalized frequency urgent item and the corresponding power urgent item to respectively obtain the coordinated frequency modulation urgent index in the up-regulation direction and the coordinated frequency modulation urgent index in the down-regulation direction.
6. The multi-time scale cooperative frequency modulation control method of the wind-fire bundling and delivery system according to claim 1, wherein the step S2 specifically comprises: in the wind-fire cooperative frequency modulation self-adaptive control algorithm, frequency dynamic characteristic components of an up-regulation direction and a down-regulation direction are calculated based on a low frequency deviation, a negative frequency change rate, a high frequency deviation and a positive frequency change rate, and an adjustment capability component of the up-regulation direction and an adjustment capability component of the down-regulation direction are calculated based on wind power up-regulation available power, wind power down-regulation available power and wind power down-regulation available power.
7. The multi-time scale cooperative frequency modulation control method of a fire-wind bundling and delivery system according to claim 6, wherein the step S2 specifically comprises: and multiplying the frequency dynamic characteristic component by the corresponding adjusting capacity component respectively, and calculating to obtain an up-regulation quick response distribution coefficient and a down-regulation quick response distribution coefficient.
8. The multi-time scale cooperative frequency modulation control method of a fire-wind bundling and delivery system according to claim 7, wherein the step S2 specifically comprises: The method comprises the steps of calculating a frequency modulation urgency mapping factor in an up-regulation direction and a frequency modulation urgency mapping factor in a down-regulation direction respectively by dividing a cooperative frequency modulation urgency index by 1 plus a cooperative frequency modulation urgency index, multiplying the frequency modulation urgency mapping factor in the up-regulation direction by an up-regulation quick response distribution coefficient to obtain a wind power up-regulation power instruction, and multiplying the frequency modulation urgency mapping factor in the down-regulation direction, the wind power available down-regulation capability and the down-regulation quick response distribution coefficient to obtain the wind power down-regulation power instruction.
9. The multi-time scale cooperative frequency modulation control method of the wind-fire bundling and delivery system according to claim 8, wherein the step S2 specifically comprises: The thermal power up-regulation power instruction is calculated by multiplying the frequency modulation urgency mapping factor in the up-regulation direction and the wind-fire available up-regulation capacity by the complementary proportion corresponding to the up-regulation quick response distribution coefficient, and the thermal power down-regulation power instruction is calculated by multiplying the frequency modulation urgency mapping factor in the down-regulation direction and the wind-fire available down-regulation capacity by the complementary proportion corresponding to the down-regulation quick response distribution coefficient.

Description

Multi-time-scale cooperative frequency modulation control method for wind-fire bundling and sending system Technical Field The invention relates to the field of wind-fire bundling and delivering systems, in particular to a multi-time-scale cooperative frequency modulation control method of a wind-fire bundling and delivering system. Background With the rapid increase of the installed capacity of new energy, the duty ratio of renewable energy sources such as wind power and the like in an electric power system is continuously improved, and wind fire bundling and delivery become an important mode for large-scale new energy development and consumption in China. However, wind power output has obvious randomness, volatility and uncertainty, so that the problem of frequency stability of the wind-fire bundling and sending system in the operation process is more remarkable, and the operation requirement of a high-proportion new energy power grid is difficult to meet in a traditional mode of relying on a thermal power unit to independently undertake a frequency modulation task. The thermal power generating unit has good continuous adjustment capability, but has a slower response speed, is difficult to timely cope with power fluctuation caused by rapid change of wind power output, and has a faster power response capability, can conduct parameter and frequency modulation in a short time, but has the defects that the adjustable capability is greatly influenced by wind speed change and the continuous adjustment capability is insufficient. Therefore, the frequency modulation by wind power or thermal power alone has limitations, and the rapid response and the continuous adjustment complement each other through the wind-fire cooperative frequency modulation mode are needed. The existing frequency modulation method mostly adopts a fixed proportion distribution or simple power deviation distribution mode, fails to comprehensively consider frequency deviation, frequency change rate and real-time adjustment capability of a wind turbine set, and is difficult to dynamically reflect the urgent degree of the frequency modulation requirement of the system, so that the response delay or unreasonable distribution of frequency modulation resources is caused when frequency disturbance occurs, and further the power stability of an outgoing channel and the operation safety of the system are affected, and the problem of the frequency safety control requirement of the power system under the condition of high-proportion new energy outgoing is difficult to meet. Therefore, a multi-time-scale cooperative frequency modulation control method capable of evaluating the frequency modulation urgency of the system in real time and adaptively distributing wind power and thermal power regulation tasks is needed, so as to improve the frequency stability and the new energy consumption capability of the wind power bundling and delivering system. By constructing a more perfect multi-time-scale cooperative frequency modulation control system, the flexibility and reliability of the wind-fire bundling and sending system are improved, and a firmer technical support is provided for the safe and stable operation of a high-proportion new energy power grid. Disclosure of Invention The invention provides a multi-time-scale cooperative frequency modulation control method of a wind-fire bundling and sending system, which aims to solve the problems that the up-regulation and down-regulation directions are not recognized respectively and are difficult to regulate corresponding to different frequency states, the wind-power up-regulation and down-regulation capability and the climbing capability of thermal power are not evaluated in a combined mode, the current problem that frequency modulation resources can be called cannot be reflected truly, the wind-power quick response and the slow-lasting thermal power are not coordinated, and the technical problem that frequency modulation distribution is unreasonable easily occurs. The invention discloses a multi-time scale cooperative frequency modulation control method of a wind-fire bundling and sending system, which comprises the following steps of: S1, acquiring real-time operation data, wherein the real-time operation data comprise a sending end bus frequency, a rated frequency, a frequency change rate, an outgoing actual measurement power, an outgoing plan power, wind power up-regulation available power, wind power down-regulation available power, a data reporting period of a synchronous phasor measurement device, a thermal power unit speed regulation execution period, a thermal power up-regulation up-climbing rate and a thermal power down-regulation up-climbing rate, multiplying the thermal power unit speed regulation execution period by the thermal power up-regulation up-climbing rate and the thermal power down-regulation up-climbing rate respectively, and then obtaining wind power up-regulation available power and wind