CN-121984238-A - New energy remote centralized control system based on real-time load curve of each station in area

CN121984238ACN 121984238 ACN121984238 ACN 121984238ACN-121984238-A

Abstract

The invention relates to the technical field of new energy remote centralized control, and discloses a new energy remote centralized control system based on real-time load curves of stations in an area, which comprises a reactive resource allocation unit, a dynamic reactive power optimization unit and a dynamic reactive power control unit, wherein the reactive resource allocation unit is used for generating a common constraint partition strategy based on the electric distance and the physical distance of each station in a new energy control area, and allocating reactive resources for each station by combining dynamic reactive power optimization and double-layer control; the system comprises a data acquisition monitoring unit, a dispatching control response unit, an execution feedback iteration unit and a visual overview unit, wherein the dispatching control response unit is used for estimating the equivalent unbalanced power of each station according to a real-time load curve, judging the probability of occurrence of accidents of the evolution of the equivalent unbalanced power, generating a station coordination control strategy based on a probability result and outputting reactive control quantity so as to realize the quick response of reactive resources. The invention can effectively reduce the occurrence probability of sudden accidents and enhance the reliability and safety of station operation.

Inventors

CHEN JIANLIN
HUA YAN
ZHOU ZHEN
DU WEI
YANG ZHIQIANG
WANG ZHIYONG
QIAN KAI
FU SHUANG
JIN CHENGMING
YANG FENG
JIA YUNWEI
LI WENTAO

Assignees

华电(云南)新能源发电有限公司

Dates

Publication Date: 20260505
Application Date: 20260129

Claims (10)

1. A new energy remote centralized control system based on real-time load curves of stations in an area is characterized by comprising: The reactive resource allocation unit is used for generating a common constraint partition strategy based on the electric distance and the physical distance of each station in the new energy control area, and allocating reactive resources for each station by combining dynamic reactive power optimization and double-layer control; The data acquisition monitoring unit is used for acquiring the running state data of each station in the new energy control area according to the reactive resource allocation result and drawing a real-time load curve of each station in the running period based on the running state data; the dispatching control response unit is used for estimating the equivalent unbalanced power of each station according to the real-time load curve, judging the probability of occurrence of accidents caused by the evolution of the equivalent unbalanced power, and generating a station coordination control strategy based on the probability result to output reactive control quantity so as to realize the rapid response of reactive resources; The execution feedback iteration unit is used for distributing reactive control quantity output control instructions according to the standby capacity duty ratio and the control performance index priority strategy, receiving the control instructions by each station terminal device to adjust the running state of each station, and feeding back the execution result in real time to judge the quality of remote centralized control of the new energy control area; The visual overview unit is used for interacting with the reactive resource distribution unit, the data acquisition monitoring unit, the scheduling control response unit and the execution feedback iteration unit, and visualizing a remote centralized control process in a new energy control area so as to facilitate overview of comprehensive situation information of all stations.
2. The new energy remote centralized control system based on the real-time load curve of each station in the area according to claim 1, wherein the reactive resource allocation unit comprises: The double-distance partition construction module is used for collecting the geographical distance between any stations in the new energy control area as a physical distance, calculating the electrical distance of each station based on the admittance matrix of each station, and outputting a partition division result by combining the voltage stability requirement and the control delay standard; The reactive power screening basic distribution module is used for decomposing the total reactive power demand in the new energy control area to each partition according to the partition dividing result and the reactive power adjustment potential to form a partition reactive power distribution reference value; the double-layer dynamic reactive power optimization module is used for adjusting the partition reactive power distribution reference value based on control time delay constraint, secondarily adjusting the partition reactive power distribution reference value based on the double-distance cross influence degree and determining a partition reactive power distribution value; And the constraint verification and closed loop correction module is used for verifying the satisfaction degree of the double constraint of the partition reactive power distribution value and each station, correcting the partition reactive power distribution value according to the satisfaction degree until the reactive power requirement of the new energy control area meets the double constraint, and distributing reactive power resources for each station.
3. The new energy remote centralized control system based on the real-time load curve of each station in the area according to claim 2, wherein the decomposing the total reactive power demand in the new energy control area into each partition according to the partition division result and the reactive power adjustment potential to form the partition reactive power distribution reference value comprises: Randomly selecting stations corresponding to the subareas as cellular cells based on the subarea division result, acquiring all stations in the cellular cells and grid-connected point geographic positions of a new energy control area, and generating a cellular station set, wherein the cellular station set comprises the station geographic positions and the grid-connected point geographic positions; Arranging the cellular station sets in descending order according to the distance difference values from the grid-connected point geographic position to the station geographic position to form a descending order set, and sequentially traversing the descending order set to screen stations with load fluctuation exceeding the target expectation as station sets to be distributed; analyzing interference of reactive power requirements in a station set to be allocated on reactive power adjustment potential, and screening uplink resources with minimum reactive power transmission loss and voltage coupling strength for the station set to be allocated according to interference results; And distributing the total reactive power demand in the new energy control area to stations in the station set to be distributed according to the rule of proportional fairness and the minimum strategy of grid-connected point voltage deviation based on the uplink resource screening result, and forming a partition reactive power distribution reference value.
4. The new energy remote centralized control system based on the real-time load curve of each station in the area according to claim 3, wherein the steps of adjusting the partition reactive power allocation reference value based on the control delay constraint and secondarily adjusting the partition reactive power allocation reference value based on the double-distance cross influence degree, and determining the partition reactive power allocation value comprise: Determining a control delay threshold corresponding to the physical distance of each partition in the new energy control area, simultaneously obtaining a partition reactive power distribution reference value, the physical distance, the current node voltage and reactive power transmission loss parameters corresponding to each partition as constraint parameters, Quantizing the control time delay of the reactive response of each partition based on the constraint parameters, and comparing the difference value between the control time delay and the control time delay threshold; If the control time delay is larger than the control time delay threshold, the partition reactive power allocation reference value of the corresponding partition is required to be adjusted, the partition reactive power allocation control value is output, and if the control time delay is smaller than or equal to the control time delay threshold, the partition reactive power allocation reference value is directly used as the partition reactive power allocation control value; And analyzing the double-distance cross influence degree of the physical distance and the electric distance on reactive power distribution according to the capacity constraint of each station, and adjusting the subarea reactive power distribution control value based on the double-distance cross influence degree to obtain the subarea reactive power distribution value.
5. The new energy remote centralized control system based on the real-time load curve of each station in the area according to claim 4, wherein the analyzing the double-distance cross influence degree of the physical distance and the electrical distance on the reactive power distribution according to the capacity constraint of each station, and adjusting the partition reactive power distribution control value based on the double-distance cross influence degree, and obtaining the partition reactive power distribution value comprises: acquiring reactive capacity constraint of each station, and dividing three-level thresholds of the physical distance and the electrical distance according to the voltage stability requirement and reactive transmission loss of the regional power grid by combining the physical distance and the electrical distance; Determining a cross influence level corresponding to the combination of the physical distance and the electric distance based on the three-level threshold, and carrying out combination judgment on all stations in the new energy control area one by utilizing the cross influence level; And outputting the cross influence level of each station according to the combination judgment result, removing stations exceeding reactive capacity constraint on the basis of the cross influence level, and adjusting the distribution proportion by taking the partition reactive power distribution control value as a reference after removing, so as to obtain the partition reactive power distribution value.
6. The new energy remote centralized control system based on the real-time load curve of each station in the area according to claim 5, wherein the cross influence level comprises a first influence level, a second influence level and a third influence level; The first influence level indicates that the joint constraint of the physical distance and the electrical distance meets the logic and judgment requirements, and the reactive transmission loss is smaller than or equal to a target threshold value and the control response is larger than or equal to a target duration; the second influence level indicates that the physical distance and the electrical distance have a type of unsatisfied logic and judgment requirements, and the reactive power transmission loss is higher than a target threshold value or the control response time is shorter than a target time; the third influence level indicates that the physical distance and the electrical distance do not meet the logic and judgment requirements; the station in the first influence level in the adjustment distribution proportion directly takes the partition reactive power distribution control value as the partition reactive power distribution value; The station in the second influence level in the adjustment distribution proportion takes the partition reactive power distribution control value as a reference, and the reference value is adjusted up by 1.2 to 1.4 times to obtain the partition reactive power distribution value; And the station in the third influence level in the adjustment distribution proportion takes the partition reactive power distribution control value as a reference, and the partition reactive power distribution value is obtained by downwards adjusting the reference value by 0.8 to 0.9 times.
7. The new energy remote centralized control system based on the real-time load curve of each station in the area according to claim 1, wherein the scheduling control response unit comprises: The load fluctuation range definition module is used for extracting the real-time variation of reactive load of each station based on the real-time load curve and defining the fluctuation range of the station load by combining the historical synchronous load curve; The unbalanced power deducing module is used for judging the frequency change rate of the load in the period of the target range according to the fluctuation range and reversely deducing the equivalent unbalanced power of each station based on the frequency change rate; the accident probability calculation module is used for calculating the continuous surge of the equivalent unbalanced power, the probability that a real-time load curve shows mutation and no back drop sign, and judging the probability of the accident caused by the evolution of the equivalent unbalanced power by combining the two probabilities; and the reactive control quantity output module is used for outputting the dangerous degree of improper coordination control of reactive resources of each station according to the probability, and generating a coordination control strategy based on the dangerous degree to output reactive control quantity so as to realize quick response of the reactive resources.
8. The remote centralized control system for new energy based on real-time load curves of all stations in an area according to claim 7, wherein the calculating the probability that the equivalent unbalanced power continuously rises and the real-time load curve shows abrupt change and no sign of falling back, and the combining the two probabilities to judge the probability that the equivalent unbalanced power evolves to have an accident comprises: setting a time threshold, judging actual amplification and critical amplification of the equivalent unbalanced power in the time threshold and the amplification threshold, and calculating the probability of continuous surge of the equivalent unbalanced power by combining a ratio method; defining that the instantaneous load increase is equal to or greater than three times of a normal fluctuation range to be in a mutation state, wherein the duration of the mutation state is greater than or equal to three seconds, so that no fallback trend exists, and analyzing the probability that a real-time load curve presents mutation and no fallback sign by combining with the state of equipment in a station; based on the probability of continuous surge of the equivalent unbalanced power and the probability of abrupt change and no sign of falling back of the load curve, the comprehensive probability of accident of the evolution of the equivalent unbalanced power is calculated by adopting a weighted summation mode.
9. The new energy remote centralized control system based on the real-time load curve of each station in the area according to claim 8, wherein the outputting the dangerous degree of improper coordination control of reactive resources of each station according to the probability size, generating the coordination control strategy based on the dangerous degree, and outputting the reactive control quantity to realize the rapid response of the reactive resources comprises: the reactive coordination control is not used as a triggering condition, and a scene construction technology is utilized to generate a risk scene of each station under the conditions of voltage out-of-limit, line overload and compensation equipment overload; Simulating the evolution process of each station under the sudden load change and the surge of equivalent unbalanced power based on the risk scene, and analyzing and quantifying the device load exceeding degree and the voltage instability range in each station according to the evolution process; And taking the exceeding degree of the equipment load and the voltage instability range as risk assessment indexes, outputting the dangerous degree caused by improper reactive power control of each station, dynamically adjusting the local reactive power output of each station based on the dangerous degree and the total reactive power demand, and determining the reactive power control quantity so as to realize the quick response of reactive power resources.
10. A new energy remote centralized control method based on real-time load curves of all stations in a region, which adopts the new energy remote Cheng Jikong system based on real-time load curves of all stations in the region as claimed in any one of claims 1 to 9 to realize remote centralized control, and is characterized in that the method comprises the following steps: generating a common constraint zoning strategy based on the electric distance and the physical distance of each station in the new energy control area, and distributing reactive resources for each station by combining dynamic reactive power optimization and double-layer control; acquiring running state data of each station in the new energy control area according to reactive resource allocation results, and drawing a real-time load curve of each station in a running period based on the running state data; estimating the equivalent unbalanced power of each station according to the real-time load curve, judging the probability of occurrence of accidents due to the evolution of the equivalent unbalanced power, and generating a station coordination control strategy based on the probability result to output reactive control quantity so as to realize the quick response of reactive resources; Distributing reactive control quantity output control instructions according to the standby capacity duty ratio and the control performance index priority strategy, receiving the control instructions by each station terminal device to adjust the running state of each station, and feeding back the execution result in real time to judge the quality of remote centralized control of the new energy control area; and visualizing a remote centralized control process in the new energy control area so as to facilitate overview of comprehensive situation information of all stations.

Description

New energy remote centralized control system based on real-time load curve of each station in area Technical Field The invention relates to the technical field of new energy remote centralized control, in particular to a new energy remote centralized control system based on real-time load curves of stations in an area. Background The new energy station refers to a facility for producing electricity by using renewable energy sources (such as wind energy, solar energy, hydraulic energy, biological energy and the like), is a clean energy production base, and mainly aims to replace the traditional fossil energy source to generate electricity, reduce the pollution to the environment and promote sustainable development. The remote centralized control of the new energy station is realized by an advanced information communication technology, data analysis and an automatic control technology, centralized monitoring, scheduling and optimizing control of the distributed new energy station (such as a wind power plant, a solar power station and the like), and the comprehensive management from data acquisition to equipment control and load scheduling to fault response can be realized by the remote centralized control of the new energy station, so that the operation efficiency of the station and the stability of a power system are improved, the complexity and the error of manual operation are reduced, the use of new energy resources is optimized, and the deep fusion of the new energy and the traditional power system is promoted. However, the existing new energy remote centralized control method usually ignores the difference of the electrical distance and the physical distance, so that the cooperative optimization among all stations cannot be fully considered in the reactive resource distribution process, and thus the reactive resource distribution is possibly uneven, and the traditional control method cannot be combined with the dynamic reactive optimization and the double-layer control strategy, so that the reactive resource cannot be accurately distributed according to the real-time requirements of all stations, thereby possibly causing low energy utilization efficiency, higher risk of overload of the system, and meanwhile, the capability of predicting equivalent unbalanced power and accident probability is lacking, potential faults are difficult to prevent in advance, and the safety and reliability of the operation of the stations are affected. For the problems in the related art, no effective solution has been proposed at present. Disclosure of Invention Aiming at the problems in the related art, the invention provides a new energy remote centralized control system based on the real-time load curve of each station in the area, so as to overcome the technical problems in the prior art. For this purpose, the invention adopts the following specific technical scheme: In a first aspect, the present invention provides a new energy remote centralized control system based on real-time load curves of stations in an area, including: The reactive resource allocation unit is used for generating a common constraint partition strategy based on the electric distance and the physical distance of each station in the new energy control area, and allocating reactive resources for each station by combining dynamic reactive power optimization and double-layer control; The data acquisition monitoring unit is used for acquiring the running state data of each station in the new energy control area according to the reactive resource allocation result and drawing a real-time load curve of each station in the running period based on the running state data; the dispatching control response unit is used for estimating the equivalent unbalanced power of each station according to the real-time load curve, judging the probability of occurrence of accidents caused by the evolution of the equivalent unbalanced power, and generating a station coordination control strategy based on the probability result to output reactive control quantity so as to realize the rapid response of reactive resources; The execution feedback iteration unit is used for distributing reactive control quantity output control instructions according to the standby capacity duty ratio and the control performance index priority strategy, receiving the control instructions by each station terminal device to adjust the running state of each station, and feeding back the execution result in real time to judge the quality of remote centralized control of the new energy control area; The visual overview unit is used for interacting with the reactive resource distribution unit, the data acquisition monitoring unit, the dispatching control response unit and the execution feedback iteration unit, and visualizing the remote centralized control process in the new energy control area so as to facilitate the overview of the comprehensive situation information of each station. Preferably, the r