	US 11,699,907 B1
	Method and system for dispatching independent energy storage power station in typical secondary frequency regulation scenario
Hua Zheng, Beijing (CN); Shiming Wang, Beijing (CN); Yifei Sun, Beijing (CN); Pei Peng, Beijing (CN); and Li Xie, Beijing (CN)
Assigned to North China Electric Power University, Beijing (CN)
Filed by North China Electric Power University, Beijing (CN)
Filed on Oct. 21, 2022, as Appl. No. 17/970,635.
Claims priority of application No. 202210535814.X (CN), filed on May 18, 2022.
Int. Cl. H02J 3/46 (2006.01); H02J 3/28 (2006.01); G05B 17/02 (2006.01); G01R 19/25 (2006.01)

CPC H02J 3/466 (2020.01) [G01R 19/2513 (2013.01); G05B 17/02 (2013.01); H02J 3/28 (2013.01)]

4 Claims

1. A method for dispatching an independent energy storage power station in a typical secondary frequency regulation scenario, comprising:

predicting an AGC frequency regulation instruction for a next stage based on a frequency regulation control data for an automatic generation control AGC frequency regulation control area, wherein the frequency regulation control data comprises historical operation data of units in the AGC frequency regulation control area, a power generation plan, a load supply and demand condition and a power grid operation condition;

determining a current typical secondary frequency regulation scenario according to the AGC frequency regulation instruction for the next stage, wherein the typical secondary frequency regulation scenario comprises a continuous upward adjustment response scenario, a continuous downward adjustment response scenario and an upward and downward adjustment fluctuation response scenario;

acquiring data required for a continuous upward adjustment, if the current typical secondary frequency regulation scenario is the continuous upward adjustment response scenario, wherein the data required for the continuous upward adjustment comprises a currently required upward adjustment response capacity of the power grid, a currently available upward adjustment response capacity of the independent energy storage power station and a currently available upward adjustment response capacity of a conventional unit;

dispatching, for the continuous upward adjustment response scenario, the independent energy storage power station to participate in an upward adjustment response according to the data required for the continuous upward adjustment, which comprises:

determining, for the continuous upward adjustment response scenario, a secondary frequency regulation value C_st^upwhen the independent energy storage power station participates in the upward adjustment response, by using a formula C_st^up=min(C_{st_up}×C_up/(C_{st_up}+C_{gen_up}),C_{st_up}), according to the data required for the continuous upward adjustment, wherein C_updenotes the currently required upward adjustment response capacity of the power grid, C_{st_up}denotes the currently available upward adjustment response capacity of the independent energy storage power station, C_{gen_up}denotes the currently available upward adjustment response capacity of the conventional unit, and min ( ) indicates to take a minimum value of a parameter in parentheses; and

dispatching the independent energy storage power station to participate in the upward adjustment response according to the secondary frequency regulation value C_st^upwhen the independent energy storage power station participates in the upward adjustment response;

acquiring data required for a continuous downward adjustment, if the current typical secondary frequency regulation scenario is the continuous downward adjustment response scenario, wherein the data required for the continuous downward adjustment comprises a currently required downward adjustment response capacity of the power grid, a currently available downward adjustment response capacity of the independent energy storage power station and a currently available downward adjustment response capacity of the conventional unit;

dispatching, for the continuous downward adjustment response scenario, the independent energy storage power station to participate in the downward adjustment response according to the data required for the continuous downward adjustment, which comprises:

determining, for the continuous downward adjustment response scenario, a secondary frequency regulation value C_st^dnwhen the independent energy storage power station participates in the downward adjustment response, by using a formula C_st^dn=min(C_{st_dn}×C_dn/(C_{st_dn}+C_{gen_dn}),C_{st_dn}), according to the data required for the continuous downward adjustment, wherein C_dndenotes the currently required downward adjustment response capacity of the power grid, C_{st_dn}denotes the currently available downward adjustment response capacity of the independent energy storage power station, C_{gen_dn}denotes the currently available downward adjustment response capacity of the conventional unit, and min ( ) indicates to take a minimum value of a parameter in parentheses; and

dispatching the independent energy storage power station to participate in the downward adjustment response according to the secondary frequency regulation value C_st^dnwhen the independent energy storage power station participates in the downward adjustment response;

acquiring data required for the upward and downward adjustment, if the current typical secondary frequency regulation scenario is the upward and downward adjustment fluctuation response scenario, wherein the data required for the upward and downward adjustment comprises the currently required upward adjustment response capacity of the power grid, the currently available upward adjustment response capacity of the independent energy storage power station, the currently required downward adjustment response capacity of the power grid and the currently available downward adjustment response capacity of the independent energy storage power station; and

for the upward and downward adjustment fluctuation response scenario, dispatching the independent energy storage power station to participate in the upward and downward adjustment fluctuation response according to the data required for the upward and downward adjustment, which comprises:

for the upward and downward adjustment response scenario, according to the data required for the upward and downward adjustment, determining a secondary frequency regulation value C_st^upwhen the independent energy storage power station participates in the upward adjustment response, by using a formula C_st^up=min(C_{st_up},C_up), and determining a secondary frequency regulation value C_st^dnwhen the independent energy storage power station participates in the downward adjustment response, by using a formula C_st^dn=min(C_{st_dn},C_dn) wherein C_updenotes the currently required upward adjustment response capacity of the power grid, C_{st_up}denotes the currently available upward adjustment response capacity of the independent energy storage power station, C_dndenotes the currently required downward adjustment response capacity of the power grid, C_{st_dn}denotes the currently available downward adjustment response capacity of the independent energy storage power station, and min ( ) indicates to take a minimum value of a parameter in parentheses; and

dispatching the independent energy storage power station to participate in the upward and downward adjustment fluctuation response according to the secondary frequency regulation value C_st^upwhen the independent energy storage power station participates in the upward adjustment response and the secondary frequency regulation value C_st^dnwhen the independent energy storage power station participates in the downward adjustment response.