故障测距、方向保护、主设备保护等新方法。用小波理论的数字手段分析故障产生信号
的整个频带信息并用于实现故障检测。这些人工智能技术不仅为提高故障判别精度提供
了手段，而且使某些基于单一工频信号的传统算法难以识别的问题得到解决。目前，微
机继电保护正沿着微机保护网络化、智能化、自适应和保护、控制、测量、信号、数据
通信一体化的方向发展。 外文文献二
The most basic request that charged barbed wire net in the city circulates is safe and stable.The core problem of charged barbed wire net safety in the city stability wants to build up to be a with the city mutually accommodative of, reasonable of charged barbed wire net structure.This text passes and programs to the charged barbed wire net with electric power and designs the technique principle of the aspect analysis.Elaborated the standard concerning electric voltage grade, power supply credibility, power supply ability and charged barbed wire net safe power supply requests etc. some problems that should notice in the charged barbed wire net safety;And have already aimed at sex's elaborating request to the concrete design principle opposite charged barbed wire net safe power supply of the 220 kV transformer substation and 110kV transformer substation.
How to promise power supply credibility
1)Satisfy charged barbed wire net power supply safe standard.The power supply network satisfies the request of power supply
credibility.The standard that all satisfies N-l, city area center high burden density important customer in the district satisfy the standard of N-2.Disallow transformer over carry.Help a southern city net power supply credibility rate index sign programming target is 99.99%.
2)Press to go together with charged barbed wire net burden to transfer ability in the city satisfy following request:
?The transformer substation loses any once enter line or one set lord transformer but lower power supply ability, win press to go together with charged barbed wire net to have to transfer burden to ensure the ability of power supply.
?When a female line of transformer substation stops a luck because of putting, winning to press to go together with charged barbed wire net should have the ability that transfer all burden.
?When the 10 kv goes together with electric wire road any check to fix or breaks down, going together with the charged barbed wire net should have non- check of transfer to fix, non- breakdown segment ability for carrying.The non- check fixs,
The non- breakdown segment carries to the power is off time only for go together with to give or get an electric shock an equipments to pour a Zha operation for time.
3)Ask to satisfy a following principle while allowing the capacity of the power outage and the target of the instauration power supply
while going together with charged barbed wire net breakdown to make the customer the power is off:
?The customer of two back track power supplies , after losing a back track, should be unlimited to give or get an electric shock.
?The customer of three back track power supplies , after losing a back track, should be unlimited to give or get an electric shock, again after losing a back track, should satisfy power supply capacity 50-70% is used an electricity.
?When all of a back track or much customer's the power of back track power supplies stopped, resume target time of power supply broke down to handle for a back track restored of ask.
?At wreath net power supply method in for open the customer in the wreath network, the lowest instauration power supply request for breaking down wreath net is to need to pass charged barbed wire net operation instauration
Power supply of time, its target time need for operating of ask;It is the power supply that passes to go together with net automation restriction to resume an intact block in the lmin to go together with net automation circuit.
(3)Power supply ability and safety
1)Of each electric voltage layer net capacity in the city net, press definitely change the electric capacity carry to compare an allocation, the all levels electric voltage net changes the electric capacity carry
compare satisfy the upper limit request that current 《electric power net in the
city programming design lead 》 stipulates.
According to 2001 national economy trade committee promulgation of electric power profession standard 《electric power system safety stability lead 》 middle finger:N.a
standard is under the normal movement method of the any component(is like circuit, generator, and transformer...etc.) in the electric power system have no break down or because of break down break to open, electric power system should
Can keep stable to circulate with normal power supply, other components however carry, electric voltage and frequency all are allowing inside the scope.This is usually called N. one standard.
The charged barbed wire net power supply safe standard has:N-l standard and quasi- N one 2 standards and Ns is one 2 standards.
City's going together with the power supply safety of charged barbed wire net to usually request is to adopt N one one standard.It is one 2 standards to have already adopted quasi- N
as well at the power supply safety specially important place one 2 standards or Ns.
2)Medium press and go together with charged barbed wire net and have certain back up capacity, generally should have 50% Yu degrees, while being any component check and fixing and breaking down and stopping and carrying should pass and pour a Zha operation can keep a segment the
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