CN-122026465-A - Day-ahead frequency modulation-oriented double-layer scheduling method and system for power exchange station and motorcade

CN122026465ACN 122026465 ACN122026465 ACN 122026465ACN-122026465-A

Abstract

The invention provides a day-ahead frequency modulation-oriented double-layer scheduling method and system for a power exchange station and a motorcade, and relates to the field of power exchange stations. The method comprises the steps of constructing a frequency modulation bidding and inventory planning model for the day-ahead of a power exchange station based on preprocessed power grid frequency modulation signals, electricity price and battery charge and discharge capacity, constructing an amplified network flow diagram for time, space and SOC by modeling a road network based on a full-charge battery power exchange scheduling scheme, and constructing an automatic driving fleet scheduling model based on the objective function for maximizing the operator profits of the automatic driving fleet. The invention can mine the coupling potential between the economic value of the power exchange station in the frequency modulation market and the flexibility of the motorcade.

Inventors

WEI XUAN
FENG XIAOKE
LUO JIANGHUI
WU CHENGHAO
SUN YIMENG
DING ZHAOHAO

Assignees

华北电力大学

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (9)

1. The day-ahead frequency modulation-oriented double-layer scheduling method for the power exchange station and the motorcade is characterized by comprising the following steps of: preprocessing the power grid frequency modulation signal, the electricity price and the battery charge and discharge capacity; Based on the preprocessed grid frequency modulation signals, electricity price and battery charge and discharge capacity, establishing an objective function which aims at maximizing electricity conversion service income and frequency modulation market income so as to establish a frequency modulation bidding and inventory planning model for outputting a day-ahead of an electricity conversion station of a full-electricity battery electricity conversion scheduling scheme; Modeling a road network into a directed graph based on the full-current battery power-exchanging scheduling scheme, and generating an augmented network flow graph of time, space and SOC, wherein road arcs are set to describe a vehicle rescheduling driving process, and the power-exchanging arcs are set to describe a vehicle power-exchanging energy-supplementing process; And constructing an automatic driving fleet scheduling model based on the augmented network flow graph and with an objective function of maximizing the benefits of the operators of the automatic driving fleet.
2. The day-ahead frequency modulated battery replacement and fleet dual-layer scheduling method as set forth in claim 1, further comprising the step of updating the full battery replacement scheduling scheme based on the actual number of battery replacement vehicles of an autopilot fleet operator by the frequency modulated bidding and inventory planning model; The automatic driving fleet scheduling model generates a new automatic driving fleet scheduling scheme based on the updated full-charge battery power-exchanging scheduling scheme; And the frequency modulation bidding and inventory planning model and the automatic driving fleet scheduling model adopt an alternate iterative updating strategy until the change rates of frequency modulation benefits and fleet operation benefits meet the preset convergence threshold.
3. The day-ahead frequency modulation-oriented bi-layer scheduling method for a power exchange station and a fleet according to claim 1, wherein the step of preprocessing the power grid frequency modulation signal, the electricity price and the battery charging and discharging capacity specifically comprises the following steps: the cumulative frequency modulation signal of each hour of the day is counted and split into the cumulative frequency modulation signal of the positive value of the corresponding upward frequency modulation and the cumulative frequency modulation signal of the negative value of the corresponding downward frequency modulation.
4. The day-ahead frequency modulation-oriented bi-layer scheduling method of a battery exchange station and a fleet of vehicles according to claim 1, wherein the frequency modulation bidding and inventory planning model is constructed and further comprises setting a charge-discharge power and frequency modulation capacity constraint, a battery energy state equation constraint, a battery replacement number constraint, a battery capacity upper and lower limit constraint, a full battery judgment constraint, a scheduling period start and end energy consistency constraint, a full battery replacement constraint and a full battery quantity equation constraint.
5. The day-ahead frequency modulation-oriented power exchange station and fleet double-layer scheduling method is characterized in that the constraint of the upper limit and the lower limit of the battery capacity is specifically achieved by analyzing the historical data of a PJM frequency modulation market and adopting extremum distribution fitting to obtain the maximum fluctuation coefficient of the upper limit and the lower limit of the battery capacity frequency modulation.
6. The day-ahead frequency modulation-oriented power exchange station and fleet double-layer scheduling method is characterized by comprising the steps of setting road network traffic conservation constraint, power exchange demand constraint, vehicle running electric quantity and time constraint, travel demand matching constraint and final moment vehicle residual electric quantity constraint.
7. The day-ahead frequency modulation-oriented bi-layer scheduling method for a battery exchange station and a fleet of vehicles, according to claim 4, is characterized in that the full-charge battery judgment constraint comprises the steps of judging that the battery energy reaches 100% of rated capacity and is full-charge, and introducing an extremely small positive number and an integer to construct a judgment constraint equation.
8. The day-ahead frequency modulation-oriented power exchange station and motorcade double-layer scheduling method is characterized in that the nodes of the augmented network flow graph of time, space and SOC comprise road network positions, discrete time and battery charge states; The road arc describes the rescheduling driving process of the vehicle, and specifically comprises the steps that the flow passing through the road arc when the vehicle runs through the current road section is expressed as 1, otherwise, the flow is expressed as 0; the setting of the commutation arc describes a vehicle commutation and energy supplementing process, and specifically comprises the steps that when the vehicle finishes the commutation at the current station, the flow of the vehicle passing through the commutation arc is expressed as 1, otherwise, the flow of the vehicle is expressed as 0.
9. Day-ahead frequency modulation-oriented power exchange station and fleet double-layer scheduling system is characterized by comprising: The signal preprocessing module is used for preprocessing the frequency modulation signal of the power grid, the electricity price and the charge and discharge capacity of the battery; The upper-layer frequency modulation bidding module is used for constructing a frequency modulation bidding and inventory planning model for outputting a day-ahead of a battery replacement station of a full-power battery power replacement scheduling scheme based on the preprocessed power grid frequency modulation signal, the power price and the battery charge and discharge capacity and the established objective function for maximizing the power replacement service income and the frequency modulation market income; The road network modeling module is used for modeling a road network into a directed graph based on the full-power battery power-exchanging scheduling scheme, generating an augmented network flow graph of time, space and SOC, wherein a road arc description vehicle rescheduling driving process is set, and a power-exchanging arc description vehicle power-exchanging energy-supplementing process is set; And the lower-layer fleet scheduling module is used for constructing an automatic driving fleet scheduling model based on the augmented network flow graph and aiming at maximizing the target function of the gains of the operators of the automatic driving fleet.

Description

Day-ahead frequency modulation-oriented double-layer scheduling method and system for power exchange station and motorcade Technical Field The invention relates to the field of power exchange stations, in particular to a day-ahead frequency modulation-oriented double-layer scheduling method and system for a power exchange station and a motorcade. Background Along with the rapid increase of large-scale renewable energy source access and electric automobile conservation, the frequency fluctuation risk of an electric power system is continuously increased, and higher requirements are put on flexible adjustment resources with rapid charge and discharge capacity. The battery replacement station with a large number of standardized power batteries is provided with high-efficiency energy supplementing service, has the power and capacity characteristics similar to those of a large-scale energy storage power station, is being explored for receiving auxiliary service requirements such as power grid frequency modulation and the like, and meanwhile, the on-demand travel service and automatic driving fleet based on electric vehicles start to be applied in part of scenes, the operation platform can intensively grasp and schedule the space-time distribution and the battery charge state of the fleet, and creates conditions for the collaborative operation of the fleet-battery replacement station-power grid multi-main body. In the prior art CN109149599a, a control method for participating in power grid frequency modulation of an electric automobile group is proposed, through frequency deviation measurement and vehicle information acquisition, an on-grid electric automobile is divided into a frequency modulation control domain, a forced charging control domain and a charging and discharging uncontrollable domain, frequency modulation power is generated by using a droop control principle, and charging and discharging control is performed on a vehicle queue according to a battery charge state, so that the power grid frequency modulation capacity requirement and the user running requirement are considered to a certain extent. However, this approach focuses on decentralized access to centralized control of the charging vehicles, without considering the service orders and rebalancing requirements of the automated driving fleet across the road network. The prior art CN118536777B also discloses a method for jointly scheduling a motorcade and an energy supplementing system in consideration of the charging/power exchanging dual-mode, which uniformly describes the path selection and the charging/power exchanging actions of the motorcade by using a time-space-electric quantity three-dimensional augmentation chart, and performs joint optimization on the motorcade and the energy supplementing system by taking the minimum operation cost of the motorcade and the minimum operation cost of the charging/power exchanging station as targets. But the scheme is mainly oriented to the cooperation of travel orders and energy supplementing cost, and the coupling potential between the economic value of the power exchange station in the frequency modulation market and the flexibility of a motorcade is difficult to fully mine. On the premise of guaranteeing the travel demands of users and the quality of electricity conversion service, how to comprehensively allocate motorcades, store electricity conversion stations and participate in electricity frequency modulation markets, and realize the collaborative optimization of frequency adjustment benefits and travel operation benefits become the technical problem to be solved urgently. Disclosure of Invention The invention aims to provide a day-ahead frequency modulation-oriented double-layer scheduling method and system for a power exchange station and a fleet, which can be used for modeling aiming at concentrated battery inventory and power exchange service characteristics of the power exchange station, taking service orders and rebalancing requirements of an automatic driving travel fleet in a road network into consideration, introducing historical signals of an electric frequency modulation market and a frequency modulation quotation mechanism, constructing a double-layer optimization framework with maximum frequency modulation income of the power exchange station as an upper-layer target and operation benefit of the automatic driving fleet as a lower-layer target, and excavating coupling potential between economic value of the power exchange station in the frequency modulation market and flexibility of the fleet. Embodiments of the present invention are implemented as follows: the embodiment of the application provides a day-ahead frequency modulation-oriented double-layer scheduling method for a power exchange station and a motorcade, which comprises the following steps: preprocessing the power grid frequency modulation signal, the electricity price and the battery charge and discharge capacity; Based on