Safety control method, system and medium for communication interruption of grid-side battery energy storage power station
A battery energy storage and safety control technology, applied in the direction of AC network load balancing, etc., can solve the problems of the response deviation of the power command of the whole station, unable to perceive the communication interruption of the original power command operation, affecting the safe and stable operation of the access grid, etc. Flexible location, convenient installation and high energy storage density
Active Publication Date: 2020-07-03
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology
But the PCS of some manufacturers does not have this function, and cannot sense the communication interruption and keep the original power command running
This will cause deviations in the response of the EMS station-wide power command due to communication interruption and the unmonitorable output power of the PCS, which may affect the safe and stable operation of the power grid in serious cases
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[0031] Such as figure 1 As shown, the implementation steps of the communication interruption safety control method of the grid-side battery energy storage power station in this embodiment include:
[0032] 1) Monitor the communication status of each power conversion system PCS in real time, if any power conversion system PCS communication interruption is detected, then skip to step 2); otherwise, skip to step 1);
[0033]2) Delaying the first specified time, automatically jumping off the outlet circuit breakers of the power conversion system PCS that have been interrupted by each communication, so that all power conversion system PCSs connected to the outlet circuit breakers that have been disconnected are all shut down; After the PCS communication of each connected power conversion system is restored, delay the second specified time, and automatically close the outlet circuit breaker, and then the power conversion system PCS connected to the outlet circuit breaker will restar...
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The invention discloses a communication interruption safety control method and system for a power grid side battery energy storage power station, and a medium. The method also comprises the followingsteps: monitoring the communication state of each power conversion system (PCS) under the jurisdiction in real time: if the communication of any PCS is interrupted, automatically tripping off an outgoing line circuit breaker of the PCS interrupted in communication after time delay, so that all PCSs tripped off from the jurisdiction outgoing line circuit breakers are completely stopped; after the communication of each PCS connected with a certain line outgoing circuit breaker is recovered, automatically switching on the line outgoing circuit breaker after time delay to restart the line outgoingcircuit breaker, and redistributing the output power of the whole station among the PCSs. After the communication with the PCS is interrupted, the automatic stop and self-healing functions of the PCSin communication interruption are achieved through automatic switching of the outgoing circuit breaker and the automatic start function of the PCS, thereby enabling the loss of the charge-discharge capacity of the energy storage battery to be reduced to the minimum.
Description
technical field [0001] The invention relates to the technical field of battery energy storage power stations, in particular to a method, system and medium for safety control of communication interruption of battery energy storage power stations on the grid side. Background technique [0002] Compared with flywheels, pumped storage and other energy storage methods, battery energy storage power stations have the advantages of high energy storage density, flexible site selection, convenient installation, smooth and stable operation in four quadrants, etc., and have entered the stage of extensive experimental construction in China. , grid side, and load side battery energy storage power stations all have a large construction scale. The energy storage power station on the power supply side is mainly used as a supporting facility for wind power and photovoltaic power generation. Through the power storage function of the energy storage power station, the impact and impact of wind p...
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IPC IPC(8): H02J3/32
Inventor 徐浩严亚兵郭思源余斌李刚朱维钧李辉吴晋波梁文武洪权臧欣刘宇
Owner STATE GRID HUNAN ELECTRIC POWER