TWI411192B - Power protection system and method - Google Patents

Abstract

The invention relates to a power protection system, comprising: plural detectors for detecting power generation of multiple generators and loading of power distribution feeder; multiple digital input/output modules for detecting state of each generator, power distribution feeder, transmission line and breaker of transformer and controlling the breakers; a remote monitoring and control station comprising a communication module for receiving signals of state of the power generation, loading and breaker and transmitting the signals via the communication module; and a decision center for determining whether unloading the power distribution feeder or tripping the generators is necessary through real-time operation based on signal transmitted from the remote monitoring and control station. If the decision center determines unloading is necessary, a control instruction is generated and transmitted to the remote monitoring and control station so that the digital input/output modules trips the power distribution feeder or breaker of transformer.

Description

Power protection system and method

The present invention relates to a power protection system and method; and more particularly to a power protection system and method that can be instantaneously operated and automatically unloaded.

With the evolution of the times, electricity has become an indispensable source of energy in the food, clothing, housing, and transportation. It is widely used in lighting, transportation, electrical appliances and various scientific and technological products, which not only improves human life, It also promotes the convenience of life. While the power company considers the problem of power system response caused by accidents such as equipment failure, decommissioning or environmental variability, two criteria are defined for accidental accidents:

1. N-1 criterion: When any equipment of transmission line, generator set or transformer is in operation, the transmission system can still operate normally.

Second, the N-2 criteria: when the second line (or the two largest generator sets) overhaul or accident suspension, any return line and any of the largest generator set overhaul, any return line and any of the largest power generation group The transmission system can still operate normally when the accident is deactivated, any line maintenance is disabled, and any of the largest generator set accidents are disabled or any of the return line accidents and any of the largest generator sets are out of service.

Different from Taiwan's main island power grid architecture, the island's power system is limited to the N-1's reserve capacity under the premise of independent power supply system and economic operation. Therefore, it is difficult for power plant operation scheduling and maintenance, so when N-2 occurs or more In an extreme accident, it is difficult to avoid the system being completely black, that is, the power outage caused by a sudden accident caused a blackout, which not only caused residents to panic, but also caused major losses to the economy. In view of this, the power company is responsible for the problem caused by the instantaneous power imbalance, and the low-frequency power is built for the feeder to eliminate the shortage of generator output (meaning power generation) and to remove the system in batches. The necessary load to protect the stability of the power system.

However, the above-mentioned low-frequency unloading strategy has the disadvantages of slow response time, inability to instantly grasp the output state of the generator set, and the inelasticity of the unloading, so that the blackout of the system caused by extreme accidents cannot be avoided. Therefore, as mentioned above, there is a need for a power protection system and method that can quickly detect and control mechanisms, enable active and rapid response in the event of extreme system accidents, and automatically remove the necessary load to overcome the prior art low frequency power.缺点 Unloading shortcomings and time constraints to reduce the chance of system blackout.

In view of the shortcomings of the prior art that the reaction time is slow due to low-frequency power unloading, the failure characteristics cannot be judged, and the unloading amount is difficult to match the power output state of the jumper, the object of the present invention is to provide a power protection system and method, in order to overcome the prior art. Difficulties, and in the event of extreme accidents, can quickly respond, remove the necessary load in the shortest time, and thus reduce the probability of system shutdown due to extreme accidents, thereby protecting the power system.

The present invention provides a power protection system including: a plurality of detectors for detecting a power generation of a plurality of generators and a load of a distribution feeder; and a plurality of digital input/output modules for detecting each The state of the circuit breaker of the generator, the distribution feeder, the power line and the transformer, and the control of the circuit breaker; a remote monitoring station comprising a communication module for receiving the signal of the power generation amount, the load amount and the state of the circuit breaker And transmitting through the communication module; and a decision center, according to the signal transmitted by the remote monitoring station, determining whether it is necessary to uninstall the distribution feeders or tripping the transformers through an instant operation, if the decision center determines that it needs to be uninstalled A control command is generated and transmitted to the remote monitoring station to cause the digital output modules to trip the circuit breakers of the distribution feeders or transformers.

According to the foregoing power protection system of the present invention, the operation time of the power protection system from detection, transmission, operation to tripping is completed within 200 milliseconds.

In the foregoing power protection system of the present invention, the decision center further calculates an emergency power generation margin of the power protection system according to the signals, wherein the emergency power generation margin is a total heat engine standby capacity of the running generator minus a single generator. Maximum reserve capacity.

In the foregoing power protection system of the present invention, the decision center further determines an unloading sequence of each of the distribution feeders according to a distribution feeder unloading sequence table.

The power protection system of the present invention, wherein the decision center further comprises: at least one front-end communication processor having an Ethernet communication interface for receiving the signals from the remote monitoring station and determining whether the device needs to be uninstalled The power distribution feeders or the transformers are tripped. If the decision center determines that the uninstallation is required, the decision center generates the control command and transmits the control command to the remote monitoring station through the Ethernet communication interface.

The foregoing power protection system of the present invention, wherein the decision center further comprises: a firewall router, providing a remote user login monitoring and maintaining the power protection system.

The foregoing power protection system of the present invention, wherein the decision center comprises: a picture control operation workstation, and converting the signal transmitted by the remote monitoring station into a state and a warning chart of the power protection system.

In the foregoing power protection system of the present invention, the decision center further includes: a database server that periodically stores the signals and stores the signals as historical and cross-sectional data when the state changes.

The power protection system of the present invention further includes: an on-line simulation system for accessing the signals and graphs from the database server for simulation and analysis.

The foregoing power protection system of the present invention, wherein the communication module comprises a fiber optic network and a switch.

In the foregoing power protection system of the present invention, each of the detectors is a power analog signal acquisition device for extracting power analog signals of the generators and the distribution feeders.

In the foregoing power protection system of the present invention, the power analog signal acquisition device is a smart digital electricity meter.

The foregoing power protection system of the present invention, wherein the remote monitoring station has an Ethernet communication interface for communicating with the decision center in real time.

In another aspect, the present invention provides a power protection method for providing a power protection system operation logic, the power protection system including a plurality of detectors, a plurality of digital input/output modules, a remote monitoring station, and a decision The remote monitoring station includes a communication module, and the power protection method includes the following steps: respectively detecting the power generation of the plurality of generators and the load of the distribution feeder by using the detectors; The output module detects the state of each circuit breaker of the generator, the distribution feeder, the power line and the transformer; the remote monitoring station receives the signal of the power generation amount, the load amount and the state of the circuit breaker and transmits the signal through the communication module Go to the decision center; use the decision center to determine whether it is necessary to uninstall the distribution feeders or jump off the transformers according to the signals transmitted by the remote monitoring station; when the decision center determines that the uninstallation is required, The decision center generates a control command and transmits the control command to the remote monitoring station; and the remote monitoring station according to the control command, The plurality of digital output module trip distribution feeders in the plurality of circuit breakers.

According to the foregoing power protection method of the present invention, the operation time of the power protection method from detection, transmission, operation to tripping is completed within 200 milliseconds.

In the foregoing power protection method of the present invention, the operation logic is as follows: when any one of the generators is tripped, the load amount equivalent to the amount of trip power generation is immediately removed.

The foregoing power protection method of the present invention, wherein the operation logic is as follows: automatically calculating an unloading threshold according to the power generation amount of the generators and the load amount of the distribution feeder; when any one of the generators is tripped, The decision center calculates whether the trip power generation amount is greater than the unloading threshold value; and if the trip power generation amount is greater than the unloading threshold value, immediately cancels an unloading amount; wherein the unloading amount is equivalent to the tripping power generation amount minus the unloading threshold The amount of load.

In the foregoing power protection method of the present invention, the operation logic further includes the step of: calculating an emergency power generation margin of the power protection system according to the signals, wherein the emergency power generation margin is a total heat engine standby capacity of the running generator minus The maximum standby capacity of a single generator; wherein the decision center calculates the unloading threshold based on the emergency power generation margin and the maximum output capacity of the single generator.

The foregoing power protection method of the present invention further includes the step of determining an unloading sequence of each of the distribution feeders according to a distribution feeder unloading sequence table.

The foregoing power protection method of the present invention further includes the steps of: receiving, by the at least one front-end communication processor having an Ethernet communication interface, the signals from the remote monitoring station and determining whether the power distribution needs to be uninstalled. The feeders or the transformers are tripped. If it is determined that the unloading is required, the control command is generated and transmitted to the remote monitoring station through the Ethernet communication interface.

The foregoing power protection method of the present invention further includes the steps of: providing a remote user login monitoring and maintaining the power protection system through a firewall router.

The foregoing power protection method of the present invention further includes the step of converting the signal transmitted by the remote monitoring station into a state and a warning chart of the power protection system by using a graphic operation workstation.

The foregoing power protection method of the present invention further includes the following steps:

The signals are stored periodically by a database server, and the signals are stored as historical and cross-sectional data when the state changes.

The foregoing power protection method of the present invention further includes the steps of: constructing an on-line simulation system for accessing the signals and graphs from the database server for simulation and analysis.

The foregoing power protection method of the present invention, wherein the communication module comprises a fiber optic network and a switch.

In the foregoing power protection method of the present invention, each of the detectors is a power analog signal acquisition device for extracting power analog signals of the generators and the distribution feeders.

In the foregoing power protection method of the present invention, the power analog signal acquisition device is a smart digital electricity meter.

The foregoing power protection method of the present invention, wherein the remote monitoring station has an Ethernet communication interface for communicating with the decision center in real time.

The invention provides a power protection system and method, enables real-time monitoring of the power supply status of a plurality of power plants and substations, and utilizes an automatic unloading logic to automatically and urgently remove the necessary emergency in a very short time in the event of an extreme accident. The load compensates for the defects and time constraints of the prior art low-frequency power-off unloading, so as to reduce the probability of the system being completely black, thereby improving the stability and safety of use, thereby increasing the implementation and utilization of the industry.

The invention is used for detecting the power supply status of a plurality of power plants and substations and immediately providing signals to a decision center to operate according to an operational logic so as to achieve a dynamic balance between system output and load.

Referring to the first figure, a system architecture diagram of an embodiment of the power protection system of the present invention is shown. As shown, the power protection system of the present invention includes a decision center 10, and each remote location is equipped with a remote monitoring station 11, 12, 13, 14 depending on the geographical location of the power plant or substation. And 15, a plurality of digital input/output modules 110, 120, 130, 140, 150, a plurality of detectors 111, 121, 131, 141, 151 and a communication module 112, 122, 132, 142, 152, Each of the remote monitoring stations 11, 12, 13, 14, 15 includes a respective digital input/output module 110, 120, 130, 140, 150, and the digital input/output modules 110, 120, 130, 140 150 is used to detect the ON/OFF state of the circuit breaker of each generator, distribution feeder, power line and transformer; the detectors 111, 121, 131, 141, 151 can be a power analog signal extraction device, for example A smart digital electric meter that takes power analog signals of each generator and distribution feeder to detect the power generation of the generator and the load of the distribution feeder; the communication modules 112, 122, 132, 142, 152 may include a fiber optic network and a switch for classifying the above power analog signals and each The signal of the ON/OFF state of the circuit breaker is transmitted to the associated remote monitoring station 11, 12, 13, 14, 15. Each remote monitoring station 11, 12, 13, 14, 15 may have an Ethernet communication interface to communicate with the decision center 10 in real time.

As shown in the first figure, the decision center 10 includes two front-end communication processors 101 and 102, which have an Ethernet communication interface, and are coupled by a communication switch 103 for performing. Each of the front-end communication processors 101 and 102 is coupled to a communication module 1010 and 1020 for receiving signals transmitted from the remote monitoring stations 11, 12, 13, 14, and 15, wherein the communications are received. The modules 1010, 1020 can also include a fiber optic network and a switch, such that the decision center 10 and the remote monitoring stations 11, 12, 13, 14, 15 form a ring fiber optic Ethernet.

In the above preferred embodiment, the power protection system may perform arithmetic processing on one of the front-end communication processors, and use another front-end communication processor as a backup or two front ends. The communication processor performs arithmetic processing, depending on the design of the user.

In addition, in this embodiment, each of the front-end communication processors 101, 102 determines whether it is needed according to a signal that is immediately transmitted by the remote monitoring stations 11, 12, 13, 14, 15 by an operational logic. Unloading the distribution feeders or tripping the transformers, if it is determined that the uninstallation is required, generating a control command and transmitting to at least one of the remote monitoring stations 11, 12, 13, 14, 15 The digital output modules 110, 120, 130, 140, 150 trip the circuit breakers of the distribution feeders or transformers, thereby avoiding a blackout of the system in the event of an accident. Furthermore, the operation time of the power protection system of the present invention from detection, transmission, operation to tripping is completed within 200 milliseconds (≦200 msec), enabling immediate protection.

It should be noted that in some preferred embodiments, the operation logic of the power protection system can be divided into two aspects, that is, when a non-extreme accident occurs and an extreme accident occurs, the non-extreme accident is, for example but not limited to, There is no continuous jump stop within a predetermined time (eg, 8 seconds); extreme accidents are, for example, but not limited to, continuous jumps within a predetermined time (eg, 8 seconds). When a non-extreme accident occurs, that is, when any of the generators is tripped, the power protection system can operate in two ways, one is to immediately remove the load equivalent to the amount of trip power generation, and the other is The decision center 10 calculates an emergency power generation margin of the power protection system at any time, and automatically calculates an unloading threshold based on the power generation of the generators and the load of the distribution feeders, when the decision center 10 calculates that the trip power generation is greater than The unloading threshold value is discharged to a load amount equivalent to the tripped power generation amount minus the unloading threshold value. The emergency power generation margin is the total heat engine standby capacity of the running generator minus the maximum standby capacity of the single generator, and the unloading threshold is determined by the decision center 10 according to the emergency power generation margin and the maximum of the single generator. The output capacity is calculated.

In addition, in some preferred embodiments, the decision center 10 may further determine an unloading sequence of each of the distribution feeders according to a distribution feeder unloading sequence table, for example, a distribution feeder having a low frequency power supply installed in front, without a low frequency The distribution feeder of the eMule is placed behind, so that the system can be completely blacked out due to extreme accidents.

Continuing to refer to the first figure, the front-end communication processors 101 and 102 can be further coupled to a firewall router 105, a map operation workstation 106, and a database server 107 via a network switching hub 104. The firewall router 105 provides a remote user login to monitor and maintain the power protection system; the map control operating station 106 converts the signals transmitted by the remote monitoring stations 11, 12, 13, 14, 15 into the power Protecting various states and warning charts of the system; and the database server 107 stores the signals and graphs at regular intervals (for example, but not limited to 1 hour), and stores the signals and graphs when the state changes, as Historical and cross-sectional data to allow users to view signal changes and status changes at different times, and users can use various status and warning charts to quickly monitor the power protection system.

In some preferred embodiments, the power protection system further includes an on-line analog system 16 including an offline analysis workstation 160 and a front-end communication processor 161. The online analog system 16 is connected to the local area network. The decision center 10 is configured to access the signals and graphs (that is, historical and cross-sectional data) from the database server 107 for simulation and analysis, except that the personnel of the power company can be used for training. The power protection system can also be improved from the simulation and analysis process, in order to reliably reduce and avoid the system blackout.

Although the foregoing concept of the power protection method of the present invention has been described in the course of explaining the power protection system of the present invention, for the sake of clarity, the flowchart will be described in detail below.

Referring to the second figure, a flow chart of an embodiment of the power protection method of the present invention is shown. First, as shown in step 210, the detectors are respectively used to detect the power generation of the plurality of generators and the load of the distribution feeders. Then, as shown in step 220, the digital input/output modules detect the respective The state of the circuit breaker of the generator, the distribution feeder, the transmission line, and the transformer, such as the ON/OFF state of the circuit breaker; then, as shown in step 230, the remote power monitoring station receives the power generation amount, the load amount, and the state of the circuit breaker. The signal is transmitted to the decision center through the communication module; then, as shown in step 240, the decision center uses the signal transmitted by the remote monitoring station to determine whether it is necessary to uninstall the distribution feeder or jump according to an instant operation. Removing the transformers; when the decision center determines that the uninstallation is required, proceeding to step 250, otherwise proceeding to step 210; as shown in step 250, generating a control command with the decision center and transmitting the control command to the remote monitoring station Finally, as shown in step 260, the remote monitoring stations cause the digital output modules to trip the circuit breakers of the distribution feeders or transformers according to the control command.

Referring to the third figure, a flow chart showing the operational logic of an embodiment of the present invention is shown. In this embodiment, after the power protection system receives the signals from the remote monitoring stations, it determines whether the order of unloading and unloading needs to be performed according to an operational logic to maintain system output and load stability. For example, when a non-extreme accident occurs (such as no continuous jump stop in 8 seconds) or an extreme accident (such as continuous jump stop within 8 seconds), you can choose to immediately remove the load equivalent to the amount of tripped power generation, or calculate Is the system's load capacity sufficient to avoid frequent and unnecessary unloading? The present invention is described as a preferred embodiment. First, as shown in step 310, an unloading threshold is automatically calculated according to the power generation of the generators and the load of the distribution feeders to avoid frequent unloading and affect the consumers. Rights.

Then, as shown in step 320, when any one of the generators is tripped, the decision center calculates whether the trip power generation amount is greater than the unloading threshold value; if the trip power generation amount is greater than the unloading threshold value, then proceeding Step 330, otherwise step 340 is performed.

Then, as shown in step 330, the amount of load corresponding to the amount of trip power generation minus the value of the unloading threshold is immediately removed.

Or, as shown in step 340, it is not unloaded because the load capacity of the system is sufficient to support the amount of trip power generation.

In the above, when an extreme accident occurs (for example, continuous jump within 8 seconds), if the first generator is skipped, the decision center calculates that the load capacity of the generators cannot be unloaded, then skips the second part. In the case of a generator, the same amount of load as the total trip power generation of the first generator and the second generator must be immediately removed to ensure system safety. However, if the first generator is unloaded, the second generator should only be removed from the load of the second generator. Similarly, those skilled in the art can easily understand and Can be extended to multiple trips.

The detailed implementation of each of the above steps has been described in detail in the foregoing description of the power protection system and will not be described herein.

In summary, the power protection system and method of the present invention have at least the following advantages:

1. Overcoming the shortcomings of the previous technology that the low-frequency unloading strategy is unloaded, the reaction time is slow, the generator set output state cannot be grasped immediately, and the unloading amount is not elastic.

Second, the decision-making center provides an operational logic based on the dynamic balance of output and load, enabling instant judgment of the state of the accident (such as extreme/non-extreme incidents) and avoiding unnecessary unloading, thereby saving the system from blackout. occur.

The above description is only for the specific embodiments of the present invention, and is not intended to limit the scope of the claims of the present invention; all other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the following Within the scope of the patent application.

10. . . Decision center

11, 12, 13, 14, 15. . . Remote monitoring station

110, 120, 130, 140, 150. . . Digital input/output module

111, 121, 131, 141, 151. . . Detector

112, 122, 132, 142, 152. . . Communication module

101, 102. . . Front-end communication processor

103. . . Communication switcher

1010, 1020. . . Communication module

104. . . Network switching hub

105. . . Firewall router

106. . . Graphic control operation workstation

107. . . Database server

16. . . Online simulation system

160. . . Offline analysis workstation

161. . . Front-end communication processor

210~260. . . step

310~340. . . step

The first figure shows a system architecture diagram of an embodiment of a power protection system of the present invention.

The second figure shows a flow chart of an embodiment of the power protection method of the present invention.

The third figure shows a flow chart of the operational logic of an embodiment of the present invention.

10. . . Decision center

11, 12, 13, 14, 15. . . Remote monitoring station

110, 120, 130, 140, 150. . . Digital input/output module

111, 121, 131, 141, 151. . . Detector

112, 122, 132, 142, 152. . . Communication module

101, 102. . . Front-end communication processor

103. . . Communication switcher

1010, 1020. . . Communication module

104. . . Network switching hub

105. . . Firewall router

106. . . Graphic control operation workstation

107. . . Database server

16. . . Online simulation system

160. . . Offline analysis workstation

161. . . Front-end communication processor

Claims (28)

A power protection system includes: a plurality of detectors for detecting a power generation of a plurality of generators and a load of a distribution feeder; and a plurality of digital input/output modules for detecting each of the generators, The state of the circuit breaker of the distribution feeder, the power line and the transformer; a remote monitoring station comprising a communication module for receiving the signal of the power generation, the load and the state of the circuit breaker and transmitting the signal through the communication module; a decision center, according to the signal transmitted by the remote monitoring station, determines whether it is necessary to uninstall the distribution feeders or jump off the transformers through an instant operation, and if the decision center determines that the uninstallation is required, the decision center generates a control The instructions are transmitted to the remote monitoring station to cause the digital output modules to trip the circuit breakers of the distribution feeders or transformers. The power protection system according to claim 1, wherein the operation time of the power protection system from detection, transmission, operation to tripping is completed within 200 milliseconds. The power protection system of claim 1, wherein the decision center further calculates an emergency power generation margin of the power protection system according to the signals, wherein the emergency power generation margin is a total heat engine standby for operating the generator. Capacity minus the maximum standby capacity of a single generator. The power protection system of claim 1, wherein the decision center further determines an unloading sequence of each of the distribution feeders according to a distribution feeder unloading sequence table. The power protection system of claim 1, wherein the decision center further comprises: at least one front-end communication processor having an Ethernet communication interface for receiving the instant from the remote monitoring station And determining whether it is necessary to uninstall the distribution feeders or to trip the transformers. If the front-end communication processor determines that the uninstallation is required, the control command is generated and transmitted to the remote monitoring station through the Ethernet communication interface. . The power protection system of claim 1, wherein the decision center further comprises: a firewall router, providing a remote user login monitoring and maintaining the power protection system. The power protection system of claim 1, wherein the decision center comprises: a picture control operation workstation, and converting the signal transmitted by the remote monitoring station into a state and a warning chart of the power protection system. The power protection system of claim 7, wherein the decision center further comprises: a database server that periodically stores the signals and stores the signals as historical and cross-sectional data when the state changes. The power protection system of claim 8, further comprising: an on-line simulation system for accessing the signals and graphs from the database server for simulation and analysis. The power protection system of claim 1, wherein the communication module comprises a fiber optic network and a switch. The power protection system of claim 1, wherein each of the detectors is a power analog signal acquisition device for extracting power analog signals of the generators and the distribution feeders. The power protection system of claim 11, wherein the power analog signal acquisition device is a smart digital electricity meter. The power protection system of claim 1, wherein the remote monitoring station has an Ethernet communication interface for communicating with the decision center in real time. A power protection method for providing a power protection system operation logic, the power protection system comprising a plurality of detectors, a plurality of digital input/output modules, a remote monitoring station, and a decision center, the remote monitoring station The power protection method includes the following steps: detecting the power generation of the plurality of generators and the load of the distribution feeder by using the detectors; and detecting, by the digital input/output modules a state of a circuit breaker of a generator, a distribution feeder, a power line, and a transformer; receiving, by the remote monitoring station, a signal of the power generation amount, the load amount, and a state of the circuit breaker, and transmitting the signal to the decision center through the communication module; The decision center determines, according to the signal transmitted by the remote monitoring station, whether it is necessary to uninstall the distribution feeders or jump off the transformers through an instant operation; when the decision center determines that the uninstallation is required, the decision center generates a control command and Transmitting the control command to the remote monitoring station; and causing the digital output modules to jump according to the control command by the remote monitoring stations The distribution of these feeders in the circuit breaker. The power protection method according to claim 14, wherein the operation time of the power protection method from detection, transmission, operation to tripping is completed within 200 milliseconds. For example, in the power protection method described in claim 14, wherein the operation logic is as follows: when any one of the generators is tripped, the load equivalent to the amount of tripped power generation is immediately removed. The power protection method according to claim 14, wherein the operation logic is as follows: automatically calculating an unloading threshold according to the power generation of the generators and the load of the distribution feeder; when any of the generators When the machine is tripped, the decision center calculates whether the trip power generation amount is greater than the unloading threshold value; and if the decision center determines that the trip power generation amount is greater than the unloading threshold value, immediately removes the equivalent of the trip power generation amount minus The load of the unloading threshold value. The power protection method of claim 17, wherein the operation logic further comprises the step of: calculating an emergency power generation margin of the power protection system according to the signals, wherein the emergency power generation margin is a running generator The total heat engine standby capacity minus the maximum standby capacity of the single generator; wherein the decision center calculates the unloading threshold based on the emergency power generation margin and the maximum output capacity of the single generator. The power protection method according to claim 14, further comprising the step of: determining an unloading sequence of each of the distribution feeders according to a distribution feeder unloading sequence table. The power protection method according to claim 14, further comprising the steps of: receiving, by the remote monitoring station, the signals from at least one front-end communication processor having an Ethernet communication interface; Determining whether it is necessary to uninstall the distribution feeders or to trip the transformers. If the front-end communication processor determines that the uninstallation is required, the control command is generated and transmitted to the remote monitoring station through the Ethernet communication interface. The power protection method according to claim 14, further comprising the step of providing a remote user login monitoring and maintaining the power protection system through a firewall router. The power protection method according to claim 14, further comprising the step of: converting the signal transmitted by the remote monitoring station into a state and a warning chart of the power protection system by using a graphic control operating workstation. The power protection method according to claim 22, further comprising the steps of: storing the signals periodically by a database server, and storing the signals as historical and cross-sectional data when the state changes. The power protection method according to claim 23, further comprising the steps of: constructing an on-line simulation system for accessing the signals and graphs from the database server for simulation and analysis. The power protection method of claim 14, wherein the communication module comprises a fiber optic network and a switch. The power protection method of claim 14, wherein each of the detectors is a power analog signal acquisition device for extracting power analog signals of the generators and the distribution feeders. The power protection method according to claim 26, wherein the power analog signal acquisition device is a smart digital electricity meter. The power protection method according to claim 14, wherein the remote monitoring station has an Ethernet communication interface for communicating with the decision center in real time.