State Grid Corporation of China

Gansu Electric Power Corporation Wind Power Technology Center

Shanghai Jiao Tong University

Wind Power Technology Center of Gansu Electric Power Company

Gansu Electric Power Company of State Grid

State Grid Gansu Eletric Power Corporation

State Grid Gansu Electric Power Corporation

North China Electric Power University

Ningbo Wang

Jin Li

Qiang Zhou

Long Zhao

Kun Ding

Yanhong Ma

Shiyuan Zhou

Liang Lu

Dan Jin

Wenying Liu

Chen Zhang

Ming Ma

Xu Cai

Rong Huang

Zheng Li

Peng Xu

Qingquan Lv

Jianmei Zhang

Dingmei Wang

Nianzong Bai

Rundong Ge

Jing Zhi

Youming Cai

Jiaming Wang

Guangtu Liu

Cai Liang

Bin Yang

Yalong Li

Jing Wen

Yi Ding

Zhongyi Liu

Dan Wang

Chongru Liu

Duo Wang

Zilan Zhao

Yuhong Zhang

Shien He

Xiaodan Wu

Xushan Han

Zifen Han

Hongquan Xu

Xiaoyong Wang

Jinping Zhang

The present disclosure discloses a control system for enhancing a frequency support capability of a wind turbine generator system. The control system includes a wind turbine, a gearbox, an electric generator and a converter. The control system is characterized by further including a supercapacitor energy storage apparatus, which includes a DC-DC converter and a supercapacitor. The converter includes DC buses, and the supercapacitor is electrically connected to the DC buses via the DC-DC converter. The supercapacitor may be orderly charged or discharged according to an operating state of the wind turbine generator system to maintain its operating condition, and has a superior reliability.

Control system of a wind turbine generator

Provided are a control method and system for enhancing an endurance capability to an abnormal voltage of a wind turbine generator system. The control method, includes; providing a doubly-fed wind turbine generator system connected to a power grid; detecting a voltage of the power grid, and determining whether the voltage of the power grid has a fault; when the voltage of the power grid has a fault, detecting a voltage of the DC buses, and determining whether the voltage of the DC buses exceeds a limit value; when the voltage of the DC buses exceeds the limit value, performing integrated system coordination control according to an abnormal operating condition mode; and when the voltage of the power grid returns to a normal range, performing integrated system coordination control according to a normal operating condition mode.

Control method and control system for enhancing endurance to anomalous voltage for doubly-fed induction generator

The present invention discloses a maintenance schedule optimization method for an electric power system including large-scale wind power to build objective function to make it get optimal results, then constrain the objective function, constraint conditions include: constrain according to maintenance natural environment; constrain according to maintenance time of wind power plant; constrain according to maintenance site of wind power plant; constrain according to system reliability at wind power plant; constrain according to maintenance continuity of generator unit. Under the above constraint conditions, the electric power system is modeled with heuristic algorithm according to the above objective function. Through modeling the electric power system including large-scale wind power, optimize maintenance time of wind turbines in electric power system through modeling under a certain constraint conditions to maintain the wind power equipment properly while ensuring maximum efficiency of wind power generation at the same time.

Maintenance schedule optimization method for electric power system including large-scale wind power

The present invention discloses a testing method for dynamic model parameters of a wind power plant, wherein under testing conditions including stable running of wind turbine generators and reactive-load compensation equipment, stable wind speed between a cut-in wind speed and a rated wind speed, and the wind power plant output smaller than a rated output, finishes a wind speed transient disturbance test, a wind power plant unit tripping and inputting disturbance test, a wind power plant power change test, a disturbance test for reactive-load compensation equipment of the wind power plant, a tripping disturbance test for hydroelectric power plant and thermal power plant near the wind power plant and a manual single-phase ground short circuit test at the outgoing line part of the wind power plant, and records running curves of the wind power plant under each condition to finish the parameter test. The present invention realizes the advantage of providing precise measurement data for the stability analysis of an electric power system and the production dispatching of a power grid.

Method for testing dynamic model parameters of wind power plant

The present invention has disclosed an optimal control method for reactive voltage of wind power and photovoltaic power centralized grid connection in the field of wind power and photovoltaic power grid connection control technology, comprising: setting actuating stations used to control single wind power plant/photovoltaic power plant, setting substations used to control actuating stations and set master station used to control all the substations; master station calculates setting voltage reference Uof each substation; adopting 3&#x3c3; method to process set voltage reference Uto obtain set voltage reference interval; regulating high-side voltage of substation to make it fall in set voltage reference interval; if high-side voltage of substation does not fall in set voltage reference interval, then regulating the equipment in wind power plant/photovoltaic power plant via actuating station. The present invention guides the actual operations of electric power system.

Optimal control method for reactive voltage of wind power and photovoltaic power centralized grid connection

A method for improving system small disturbance stability after double-fed unit gets access to the system belongs to the field of electric power system operation and control technology. A sensitivity analysis is adopted to optimize parameter, through making sensitivity analysis on the non-ideal dominant mode happens to the system to find out several nonzero elements that are most sensitive to this mode in system matrix; elements of state matrix is adopted to replace the elements of system matrix to make analysis so as to find out the most relevant parameter set; setting parameters change in the interval to observe track for the change of eigenvalues of corresponding mode and then balancing and optimizing system parameters comprehensively according to the change of eigenvalues. Without adding other control means, the present invention can improve dominant modal damping caused by selecting improper controller parameters or system parameters after double-fed unit gets access to the system without increasing cost; as this method is also highly targeted, exhaustive efforts for all the adjustable parameters of the system can be avoided, which not only greatly decreases workload, but also improves computational efficiency, so that it is very instructive.

Method for improving small disturbance stability after double-fed unit gets access to the system

The present invention has disclosed a wind power bundling control method after wind power and thermal power are connected to a power grid in the field of electric power system security technology, including regulating wind power output and thermal power output forward or backward; calculating the transient stability margin of the grid, load level index of element and voltage out-of-limit index of busbar after regulating wind power output and thermal power output respectively; calculating wind power/thermal power paying value according to the transient stability margin of the grid, load level index of element and voltage out-of-limit index of busbar after regulating wind power output and thermal power output; if wind power/thermal power paying value is larger than set threshold value, regulating wind power output and thermal power output backward/forward; if wind power/thermal power paying value is smaller than set threshold value, regulating wind power output and thermal power output forward/backward. The present invention provides a wind power bundling control method after wind power and thermal power are connected to the power grid to ensure reasonable output of wind power and thermal power, so as to guarantee the power grid operates normally.

Wind power bundling control method after wind power and thermal power are connected to grid

Growing community of inventors

Lanzhou, China

Ningbo Wang