Monitoring system and method for megawatt level battery energy storage power plant
First Claim
1. A monitoring and controlling method for megawatt level battery energy storage power plant is characterized that, comprising:
- step A. The central monitoring and controlling module reads the data of the battery energy storage power plant through the communication network, and stores and manages above data, said the communication network adopts real time and non real time communication parallel network structure;
step B. Determining the total power demand of the battery energy storage power plant according to the central monitoring and controlling module;
step C. Determining all the power demand values of the energy storage substation of the battery energy storage power plant according to the central monitoring and controlling module, and sending it to all the local monitoring and controlling modules;
step D. Calculating all the power command values of the energy storage units of the energy storage substation according to the local monitoring and controlling module, and sending it to the energy storage units;
step E. Sending all the power command values, real time data and non real time data of the energy storage units that are saved temporarily in the local monitoring and controlling module to the central monitoring and controlling module to storage and mange through the communication network;
the total power demand of the battery energy storage power plant can be determined by anyone as below in step B;
B1) reading wind/photovoltaic generation smooth aim value and the total power real time, and the different value to get which the latter value is subtracted from the former value is the total power demand of the battery energy storage plant the smooth wind/photovoltaic generation output fluctuation needed;
B2) reading wind/photovoltaic generation plan value real time, and determining the total power of the wind/photovoltaic energy storage generation, the power value of the wind and photovoltaic generation is subtracted from the total power value, and judge by the minus value and then adjust, get the total power demand of the battery energy storage station of tracking plan needed at present;
B3) reading system frequency regulation power command value PESAGC, judging whether it satisfies the maximum allowable discharge power constraints or the maximum allowable charging power constraints according to the sign of PESAGC;
if the violation of the constraint conditions, taking the battery energy storage station maximum allowed discharge power or the maximum allowable charging power as system frequency regulation required total power of the battery energy storage;
otherwise, PESAGC will be considered as system frequency regulation required total power of the battery energy storage;
B4) reading real the peak shaving curve value and system load curve value at present, and judging and re-correcting the minus value get from which the latter is subtracted from the former, and get the total power demand of the battery energy storage station of shaving peak needed at present;
B5) taking the battery energy storage station maximum allowed discharge power as the safe and stable control need total power of the battery energy storage; and
B6) reading real time the total power of the battery energy storage station need that is sent by external dispatch center directly.
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Abstract
The present invention relates to a monitoring and controlling system and method for megawatt level battery energy storage power plant, which includes: a central monitoring and controlling module is used to determine the power command value of each energy storage substation of the battery energy storage power plant, and send it to all the local monitoring and controlling modules; the local monitoring and controlling modules is used to calculate the power command value of each energy storage unit of the energy storage substations controlled by it, and sending it to each energy storage unit, and upload to the central monitoring and controlling module to store. Between the central monitoring and controlling module and the local monitoring and controlling modules, the data transmission and communication are carried out through communication networks; the communication networks adopt real time and non real time communication parallel network structure.
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Citations
8 Claims
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1. A monitoring and controlling method for megawatt level battery energy storage power plant is characterized that, comprising:
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step A. The central monitoring and controlling module reads the data of the battery energy storage power plant through the communication network, and stores and manages above data, said the communication network adopts real time and non real time communication parallel network structure; step B. Determining the total power demand of the battery energy storage power plant according to the central monitoring and controlling module; step C. Determining all the power demand values of the energy storage substation of the battery energy storage power plant according to the central monitoring and controlling module, and sending it to all the local monitoring and controlling modules; step D. Calculating all the power command values of the energy storage units of the energy storage substation according to the local monitoring and controlling module, and sending it to the energy storage units; step E. Sending all the power command values, real time data and non real time data of the energy storage units that are saved temporarily in the local monitoring and controlling module to the central monitoring and controlling module to storage and mange through the communication network; the total power demand of the battery energy storage power plant can be determined by anyone as below in step B; B1) reading wind/photovoltaic generation smooth aim value and the total power real time, and the different value to get which the latter value is subtracted from the former value is the total power demand of the battery energy storage plant the smooth wind/photovoltaic generation output fluctuation needed; B2) reading wind/photovoltaic generation plan value real time, and determining the total power of the wind/photovoltaic energy storage generation, the power value of the wind and photovoltaic generation is subtracted from the total power value, and judge by the minus value and then adjust, get the total power demand of the battery energy storage station of tracking plan needed at present; B3) reading system frequency regulation power command value PESAGC, judging whether it satisfies the maximum allowable discharge power constraints or the maximum allowable charging power constraints according to the sign of PESAGC;
if the violation of the constraint conditions, taking the battery energy storage station maximum allowed discharge power or the maximum allowable charging power as system frequency regulation required total power of the battery energy storage;
otherwise, PESAGC will be considered as system frequency regulation required total power of the battery energy storage;B4) reading real the peak shaving curve value and system load curve value at present, and judging and re-correcting the minus value get from which the latter is subtracted from the former, and get the total power demand of the battery energy storage station of shaving peak needed at present; B5) taking the battery energy storage station maximum allowed discharge power as the safe and stable control need total power of the battery energy storage; and B6) reading real time the total power of the battery energy storage station need that is sent by external dispatch center directly. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A monitoring and controlling system for megawatt level battery energy storage power plant is characterized that, comprising:
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a central monitoring and controlling module stored in a memory, being used to determine the power command value of each energy storage substation of the battery energy storage power plant, and sending it to all the local monitoring and controlling modules; the local monitoring and controlling modules, being used to calculate the power command value of each energy storage unit of the energy storage substations controlled by it, and sending it to each energy storage unit, and upload to the central monitoring and controlling module to store; between said central monitoring and controlling module and said local monitoring and controlling modules, the data transmission and communication are carried out through communication networks, said communication networks adopt real time and non real time communication parallel network structure; said central monitoring and controlling module includes; a central support module, being used to read the data of the battery energy storage plant, and send it to central storage module; a central power management module, being used to calculate real timely total power demand of the battery energy storage plant and determine the power command value of each energy storage unit of the power plant according to specific application, and sending it to central storage module and central real time communication module; a central storage module, being used to storage the data of battery energy storage and the power command value of each energy storage substation, and give the data and the power command values to corresponding interface variables for the local central monitoring and controlling module and external dispatch center to call; and a central communication module, including central real time communication module and central non real time communication module, said central real time communication module communicates real time with the local monitoring and controlling module and external dispatch center through real time communication network;
said central non real time communication module communicates with the local monitoring and controlling module and external dispatch center through non real time communication network;said central power management module includes; smooth wind/photovoltaic power output module, being used to calculate real time total power demand of the battery energy storage plant that is smooth wind/photovoltaic generation output fluctuation required; tracking program power generation module, being used to compute total power demand of the battery storage plant real-time for tracking program power; system frequency regulation module, being used to compute total power demand of the battery storage plant real-time for frequency regulation; peak shaving module, being used to calculate total power demand of the battery storage plant real-time for shaving peak; security and stability control module, being used to calculate total power demand of the battery storage plant real-time for safe and stable control; energy storage power station total power demand real-time allocation module, being used to calculate the power command value of each energy storage substation according to the battery energy storage need total power computed by any above said module calculation or sent directly by the external dispatch center; and data process module, being used to read the real time data that is transmitted through the central real time communication module, and send the data to smooth wind/photovoltaic power output module, tracking program generation module, system frequency regulation module, peak shaving module, security and stability control module, or energy storage power station total power demand real-time allocation module to compute, and then send the calculation results to the central real time communication module and the central storage module. - View Dependent Claims (8)
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Specification