CN-122022140-A - Hydropower unit primary frequency modulation performance evaluation method and related device

CN122022140ACN 122022140 ACN122022140 ACN 122022140ACN-122022140-A

Abstract

The invention discloses a primary frequency modulation performance evaluation method and a related device of a hydroelectric generating set, wherein the method comprises the following steps of constructing a primary frequency modulation performance evaluation database, constructing a special exemption factor in an examination period, constructing a primary frequency modulation application exemption model based on the special exemption factor in the examination period, constructing a primary frequency modulation performance evaluation layering system based on the constructed primary frequency modulation application exemption model, and evaluating the primary frequency modulation performance of the hydroelectric generating set based on the primary frequency modulation performance evaluation layering system and the primary frequency modulation performance evaluation database.

Inventors

TAN BO
LI HAOWEI
WANG JUNBO
CHENG SHUAI
ZHANG SHIMING
YANG SHENGLI
NAN JIANG
LIU XIAOGUO
YUAN ZHIWEI
XU NANNAN
ZHOU BO
LI JUN
LI CHENHAO

Assignees

西安热工研究院有限公司
四川华能宝兴河水电有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260119

Claims (10)

1. The primary frequency modulation performance evaluation method of the hydroelectric generating set is characterized by comprising the following steps of: Constructing a primary frequency modulation performance evaluation database; constructing a special exemption factor in an examination period, and constructing a primary frequency modulation application exemption model based on the special exemption factor in the examination period; building a primary frequency modulation performance evaluation layering system based on the primary frequency modulation application exemption building model; and evaluating the primary frequency modulation performance of the hydroelectric generating set based on the primary frequency modulation performance evaluation layering system and the primary frequency modulation performance evaluation database.
2. The method for evaluating the primary frequency modulation performance of the hydroelectric generating set according to claim 1, wherein the data in the primary frequency modulation performance evaluation database comprises data obtained by monitoring n segments of monitoring systems and data in a monthly frequency modulation check list, wherein each segment of starting time t i1 and ending time t i2 , i=1, and the number of the segments is n; the monitoring system monitoring data comprises a system frequency f t , a unit active power P t and a unit target load instruction P N , so as to obtain a primary frequency modulation frequency difference delta f (t), a unit rotating speed unequal rate delta, a primary frequency modulation theoretical action integral electric quantity H e and a primary frequency modulation actual integral electric quantity H r ; The data in the monthly frequency modulation checking list comprises a system frequency peak f 0 , theoretical action integral electric quantity H e0 and actual action integral electric quantity H r0 .
3. The method for evaluating primary frequency modulation performance of a hydroelectric generating set according to claim 1, wherein the special exemption factor in the checking period comprises that during the period of AGC instruction or scheduling curve change, the primary frequency modulation action adjustment target load of the generating set exceeds the adjustable output range of the generating set.
4. The method for evaluating primary frequency modulation performance of a hydroelectric generating set according to claim 1, wherein the exemption items in the primary frequency modulation application exemption model comprise primary frequency modulation assessment key variable measured value deviation of a power station side and a scheduling side is large, AGC instructions or scheduling plan curve change periods, primary frequency modulation action target load exceeds an actual adjustable range, and the time periods of the rest monthly frequency modulation assessment list are primary frequency modulation actual action disqualification items; the primary frequency modulation application exemption model comprises a primary frequency modulation examination key variable data abnormal application exemption sub-model, an AGC instruction or a scheduling plan curve change period application exemption sub-model and a primary frequency modulation examination application exemption sub-model with a primary frequency modulation action target load exceeding an adjustable range.
5. The method for evaluating the primary frequency modulation performance of the hydroelectric generating set according to claim 1, wherein the attribute in the primary frequency modulation performance evaluation layered system is classified into a region A class, a frequency difference B class and an assessment characteristic C class; the regional attribute is middle east A1 and Yunnan A2; Reading system frequency in a monthly frequency modulation checking list according to the primary frequency modulation actual action disqualification item, and checking frequency difference f k =f 0 -50; The frequency difference assembly comprises A1-B1, A1-B2, A2-B1 and A2-B2, wherein A1-B1 represents small frequency difference disturbance of a middle east region, f k is less than or equal to 0.07Hz, A1-B2 represents large frequency difference disturbance of the middle east region, f k is more than 0.07Hz, A2-B1 represents small frequency difference disturbance of a Yunnan region, f k is less than or equal to 0.08Hz, A2-B2 represents large frequency difference disturbance of the Yunnan region, and f k is more than 0.08Hz; Each examination period T max of the A1 region is less than or equal to 60; Each checking period T max of the deviation degree of the A2 area B1 is less than or equal to 60, and each checking period T max of the deviation degree of the A2 area B2 is less than or equal to 120; analyzing the k-th segment characteristics of the primary frequency modulation actual action disqualification term, wherein k=1. The components of the disqualified term feature comprise C1 non-action, C2 reverse regulation and C3 under regulation, wherein the quantity of disqualified terms of C1, C2 and C3 is n 1 、n 2 、n 3 , and n 1 、n 2 、n 3 is initialized to 0.
6. The method for evaluating primary frequency modulation performance of a hydroelectric generating set according to claim 5, wherein when the absolute value of the unit load deviation between the end and the start of the actual primary frequency modulation action does not exceed the dead zone of single load adjustment, it is determined that the primary frequency modulation action failure characteristic of the checking section is C1 and n 1 =n 1 +1, and the failure term characteristic C1 has the expression: When the actual primary frequency modulation action result is high-frequency load increase or low-frequency load decrease, judging that the unqualified characteristic of the primary frequency modulation action in the checking section is C2, and n 2 =n 2 +1, wherein the expression of the unqualified item characteristic C2 is as follows: And when the unqualified characteristics of the checking section do not meet the requirements of C1 and C2, judging that the unqualified characteristics of the primary frequency modulation action of the checking section are C3 and n 3 =n 3 +1.
7. The method for evaluating primary frequency modulation performance of a hydroelectric generating set according to claim 6, wherein for the primary frequency modulation failure feature C3, the primary frequency modulation performance of the attributes A1-B1, A1-B2, A2-B1, A2-B2 is evaluated; Setting 3 performance evaluation indexes, wherein the pilot index G 1 is used for measuring the integral electric quantity contribution performance in 15s before the primary frequency modulation action, the middle section index G 2 is used for measuring the integral electric quantity contribution performance in 30s before the primary frequency modulation action, and the mileage index G 3 is used for measuring the integral electric quantity contribution performance in 60s before the primary frequency modulation action; Setting the primary frequency modulation comprehensive performance G 4 and a primary frequency modulation response maximum load adjustment quantity ratio G 5 ;G 5 as the proportion of an actual maximum load value P N2 to a theoretical maximum load value P N1 in the whole period of primary frequency modulation action of the unit after the system frequency exceeds a primary frequency modulation dead zone; the expression of the primary frequency modulation comprehensive performance G 4 is as follows: The primary frequency modulation checking frequency difference is A1-B1, and the undershot threshold value G is less than 60%; when the checking period is less than or equal to 30s and G is less than 60%, judging that the primary frequency modulation comprehensive action integral electric quantity of the small frequency difference is insufficient; When the assessment period is more than 30s, if G 1 is more than 30% and G is more than 60%, the primary frequency modulation early-stage action integral electric quantity is judged to be insufficient, if G 1 is more than or equal to 30% and G 2 is more than 50% and G is more than 60%, the primary frequency modulation middle-stage action integral electric quantity is judged to be insufficient, and if G 1 is more than or equal to 30% and G 2 is more than or equal to 50% and G is more than 60%, the primary frequency modulation comprehensive action integral electric quantity is judged to be insufficient; The primary frequency modulation checking frequency difference is A1-B2, and the undershot threshold value G 4 is less than 70%; when the assessment period is less than or equal to 30s, if G 1 is less than 30 percent and G 4 is less than 70 percent, judging that the integrated electric quantity of primary frequency modulation early-stage action is insufficient, and if G 1 is more than or equal to 30 percent and G 4 is less than 70 percent, judging that the integrated electric quantity of large-frequency difference action of the unit is insufficient; When the assessment period is more than 30s, if G 1 is more than 30% and G 4 is more than 70%, the integrated electric quantity of primary frequency modulation early-stage action is judged to be insufficient, if G 1 is more than or equal to 30% and G 2 is more than 50% and G 4 is less than 70%, the integrated electric quantity of primary frequency modulation middle-stage action is judged to be insufficient, and if G 1 is more than or equal to 30% and G 2 is more than or equal to 50% and G 4 is judged to be insufficient; The primary frequency modulation checking frequency difference is A2-B2, the undershot threshold value is 3 gears, the threshold value G is less than 30% in 30s, the threshold value G is less than 50% in 30-60 s, and the threshold value G is less than 80% in 60-120 s; When the assessment period is less than or equal to 30s, if G is less than 30%, judging that the integrated electric quantity of the large-frequency difference action of the unit is insufficient; When the assessment period is 30 s-60 s, if G 2 is less than 30% and G is less than 50%, judging that the integral electric quantity of the primary frequency modulation middle-stage action is insufficient, if G 2 is more than 30% and G is less than 50%, judging that the integral electric quantity of the unit large-frequency difference action is insufficient; When the assessment period is more than 60s, if G 2 is less than 30%, the action integral electric quantity in the middle of the primary frequency modulation is judged to be insufficient, if G 2 is more than or equal to 30% and G 3 is less than 50%, the action integral electric quantity in the primary frequency modulation mileage is judged to be insufficient, and if G 2 is more than or equal to 30% and G 3 is more than or equal to 50% and G is less than 80%, the action integral electric quantity in the primary frequency modulation comprehensive is judged to be insufficient.
8. A hydroelectric generating set primary frequency modulation performance evaluation system is characterized by comprising the following steps: The construction module is used for constructing a primary frequency modulation performance evaluation database; The first building module is used for building a special exemption factor in the checking period and building a primary frequency modulation application exemption model based on the special exemption factor in the checking period; The second building module is used for building a primary frequency modulation performance evaluation layering system based on the primary frequency modulation application exemption building model; and the evaluation module is used for evaluating the primary frequency modulation performance of the hydroelectric generating set based on the primary frequency modulation performance evaluation layering system and the primary frequency modulation performance evaluation database.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the hydropower unit primary frequency modulation performance evaluation method according to any one of claims 1-7.
10. A computer-readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the hydropower unit primary frequency modulation performance evaluation method according to any one of claims 1-7.

Description

Hydropower unit primary frequency modulation performance evaluation method and related device Technical Field The invention belongs to the technical field of operation and control of electric power systems, and relates to a primary frequency modulation performance evaluation method and a related device of a hydroelectric generating set. Background In a novel power system with high-proportion new energy and power electronization, the power grid frequency faces brand new challenges of more severe fluctuation, more severe response requirements and more complex regulation resources, and the system has stronger frequency modulation capability. The primary frequency modulation is used as a first defense line for stabilizing the frequency of a power grid, the output is automatically regulated in a second level, the burst frequency deviation is simulated, the time is strived for subsequent regulation measures, and meanwhile, key support is provided for the inertia and damping of the system, so that the primary frequency modulation is a foundation for guaranteeing the safe and stable operation of the system. The hydroelectric generating set participates in primary frequency modulation and has the characteristics of high response speed, low adjustment cost, low carbon and environmental protection, but is limited by the characteristics of the hydroelectric generating set and has the limitation of adjustment capability. The dispatching center automatically collects the unit operation data through the EMS system, and generates the compensation/deduction cost of the frequency modulation service according to the 'two rules' of grid-connected operation by taking month as a period. The parameter setting of the speed regulating system of the partial hydroelectric generating set is unreasonable, and the phenomenon of 'undershoot', 'reverse regulation' or 'no action' can exist. Therefore, it is necessary to manually analyze the frequency and the variation trend of the integrated electric quantity, to report the auxiliary frequency modulation examination item, and to manually adjust the control parameters. Aiming at the problem, a hydropower plant needs to adopt a digital intelligence method, construct an autonomous generation primary frequency modulation application exemption model according to the regulations of the rule of implementation of electric grid-connected operation management in the south area and in combination with special situations such as reservoir capacity constraint, equipment constraint and the like, analyze the key variable dynamics of the primary frequency modulation assessment failure process through data, provide the optimization direction of PID parameters of a speed regulation system and promote auxiliary frequency modulation benefits, but similar disclosure is not given in the prior art. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a primary frequency modulation performance evaluation method and a related device of a hydroelectric generating set, wherein the method and the related device can assist in increasing market income of frequency modulation services. In order to achieve the purpose, the invention discloses a primary frequency modulation performance evaluation method of a hydroelectric generating set, which comprises the following steps: Constructing a primary frequency modulation performance evaluation database; constructing a special exemption factor in an examination period, and constructing a primary frequency modulation application exemption model based on the special exemption factor in the examination period; building a primary frequency modulation performance evaluation layering system based on the primary frequency modulation application exemption building model; and evaluating the primary frequency modulation performance of the hydroelectric generating set based on the primary frequency modulation performance evaluation layering system and the primary frequency modulation performance evaluation database. Further, the data in the primary frequency modulation performance evaluation database comprises data obtained by monitoring n sections of monitoring systems and data in a monthly frequency modulation check list, wherein each section of starting time t i1 and ending time t i2, i=1, and n; the monitoring system monitoring data comprises a system frequency f t, a unit active power P t and a unit target load instruction P N, so as to obtain a primary frequency modulation frequency difference delta f (t), a unit rotating speed unequal rate delta, a primary frequency modulation theoretical action integral electric quantity H e and a primary frequency modulation actual integral electric quantity H r; The data in the monthly frequency modulation checking list comprises a system frequency peak f 0, theoretical action integral electric quantity H e0 and actual action integral electric quantity H r0. Furthermore, the special exemption factors