CN105322541B - A kind of substation simulation tidal current computing method - Google Patents
A kind of substation simulation tidal current computing method Download PDFInfo
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- CN105322541B CN105322541B CN201510807529.9A CN201510807529A CN105322541B CN 105322541 B CN105322541 B CN 105322541B CN 201510807529 A CN201510807529 A CN 201510807529A CN 105322541 B CN105322541 B CN 105322541B
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Abstract
The present invention relates to a kind of substation simulation tidal current computing methods, belong to operation and control of electric power system technical field.The present invention reads primary equipment information and topological relationship information in substation first, then according to primary equipment information and Topology generation topology island information；Finally according to the flow data of primary equipment in power equilibrium calculation topology island.The present invention is by identifying the mode of connection and the method for operation of busbar, according to the topological connection relation of substation, according to power, power factor (PF), the phase current of each circuit in power equilibrium calculation island in each topological island；Corresponding calculating is had also been made for the trend under the methods of operation such as mother operation, main transformer paired running, meets substation's flow data feature, flow data is provided for monitoring system of electric substation or simulation training system.
Description
Technical field
The present invention relates to a kind of substation simulation tidal current computing methods, belong to operation and control of electric power system technical field.
Background technology
In monitoring system of electric substation test, the course of receiving, flow data is needed to examine picture refreshing, configuration, data statistics
Etc. functions, usually there are two types of test method.First method is to access voltage, current analog to measure and control device by tester
Amount；When device is more, need device wiring one by one, debugging work load big；Secondly, it can only be connect every time to several devices therein
Enter analog quantity, the telemetry refresh case of whole station cannot be detected simultaneously；Second method is to be by analog machine and monitoring
System communication, the data such as upper power transmission pressure, electric current, power, but flow data caused by this method is often random number, between data
Onrelevant, data variation randomness is larger, does not meet the flow data feature during substation operation, can not comprehensive school
Test the function of monitoring system of electric substation.
Flow data is also an essential part in Substation Training Simulator, meets substation operation feature
Flow data energy imitating substation power flow changing scene true to nature, enhances result of training；Breaker operator, event in training process
Trend after barrier after the switch changed positions such as protection act accordingly changes correspondingly, this has been required for becoming according to connection type and the method for operation
Change and dynamic Load flow calculation.
Current Load flow calculation is the Load flow calculation towards power grid, needs the topological structure of power grid and the impedance ginseng of each circuit
It counts, regards substation as a node in power grid in calculating process, calculated flow data is all the trend of grid nodes
Data.And the Load flow calculation in substation can be regarded as the Load flow calculation of zero impedance, substation line is numerous, and the method for operation is more
Become, the existing tidal current computing method towards power grid cannot be satisfied Load flow calculation requirement in station.
Invention content
The object of the present invention is to provide a kind of substation simulation tidal current computing methods, to realize to emulating trend in substation
Calculating.
The present invention provides a kind of substation simulation tidal current computing method to solve above-mentioned technical problem, the computational methods packet
Include following steps：
1) primary equipment information and primary equipment topological connection relation in substation are obtained；
2) topological island information is generated according to primary equipment topological connection relation and on off state；
3) based on power-balance, power-balance expression formula is established, in conjunction with topological island interior power line power value, load
Line load ratio and direction of tide calculate the active power, reactive power, power factor (PF) of each circuit, in conjunction with residing for topological island
Voltage class calculates phase current；
4) step 1) -3 is repeated after switch changed position or when power circuit trend changes), weight is carried out to the trend of substation
It is new to calculate.
The topology island refers to the primary equipment set being connected, and in topological island centered on busbar, regards busbar as each line
Road connecting node, for busbar paired running mode, the busbar that bus connection switch is connected is merged into a node；For busbar point
The row method of operation, the busbar that bus connection switch is connected is respectively as independent node.
During the Load flow calculation of the step 3), when main transformer paired running, the power between main transformer is according to main transformer capacity
Pro rate；It is respectively independent to calculate when main transformer fanout operation.
During the Load flow calculation of the step 3), for transformer, power attenuation thinks to be 0, and each side power of main transformer is full
Sufficient power-balance requirement；For two-winding transformer, after the completion of the power calculation of main transformer side, other side performance number is set as
The performance number of calculation side, symbol are opposite；For three-winding transformer, after the power of both sides has been calculated, according to power equilibrium calculation
The power of third side.
During the Load flow calculation of the step 3), mother is in wherein one when closing position, connected by calculating mother
The power of line power and calculating busbar breaker on section busbar；For 3/2 wiring, often the circuit breaker current on string is according to base
You calculate Hough current law.
Primary equipment topological connection relation is the primary equipment topology generated by graphic configuration tool in the step 1)
Information, every topology information are a nodal informations, including the primary equipment ID that is connected of the node and terminal number.
Primary equipment information in the step 1) includes that primary equipment ID number, primary equipment type are associated with primary equipment
Flow data.
The beneficial effects of the invention are as follows:The present invention reads primary equipment information and topological relationship information in substation first,
Then according to primary equipment information and Topology generation topology island information；Finally according to primary in power equilibrium calculation topology island
The flow data of equipment.The present invention is closed by the mode of connection and the method for operation of identification busbar according to the Topology connection of substation
System, according to power, power factor (PF), the phase current of each circuit in power equilibrium calculation island in each topological island；For mother
Corresponding calculating has also been made in trend under the methods of operation such as operation, main transformer paired running, meets substation's flow data feature, to become
Power Station Monitored Control System or simulation training system provide flow data.
Description of the drawings
Fig. 1 is the overview flow chart of substation simulation tidal current computing method of the present invention；
Fig. 2 is the implementation flow chart of Load flow calculation module.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings.
1. reading primary equipment information, relevant information is read according to its feature to different types of equipment
Primary equipment information includes device id number, device type, the associated flow data of equipment；Device type refers to different companies
Switchtype under mode, disconnecting link type are connect, wiring feature can be reacted.Such as：For double bus scheme form, isolation switch
Type includes outgoing line side disconnecting link, mother's I isolation switch, mother's II isolation switch；Normal circuit breaker, mother open circuit are divided into for breaker
Device, 3/2 wiring mother's I breaker, 3/2 wiring network interconnecting circuit, 3/2 wiring mother's II breaker etc.；Primary equipment information is not for
With the automatic identification and calculating of connection type and the method for operation.Primary equipment information is completed by modeling tool, is stored in database
In.
2. reading whole station primary equipment topological relationship information.
Primary equipment topological connection relation is the primary equipment topological data information generated by graphic configuration tool, every
Topology information is a nodal information, including the primary equipment ID number that is connected of the node and terminal number.
3. according to primary equipment information and Topology generation topology island information.
Topological island refers to the primary equipment set being connected, and in topological island centered on busbar, regards busbar as each circuit (packet
Include main transformer side) connecting node, for busbar paired running (bus connection switch, which is in, closes position) mode, the mother that bus connection switch is connected
Line is merged into a node；For busbar fanout operation (bus connection switch, which is in, divides position) mode, the busbar that bus connection switch is connected
Respectively as independent node.Each topology island is using busbar as the set of each circuit of connecting node, and the switch of each circuit is equal
In conjunction position.For there is the busbar of busbar breaker, if busbar breaker, which is in, closes position, the busbar being connect with busbar breaker
It is merged into a busbar；Busbar breaker, which is in, divides position, each busbar independently to calculate；The circuit for dividing position is in for breaker, it should
In addition to voltage it is 0 in the flow data of circuit.
3. according to the flow data in power equilibrium calculation topology island.
Load flow calculation establishes power-balance expression formula based on power-balance in topological island, in conjunction in topological island
Know that condition (power circuit performance number, charge circuit load proportion and direction of tide) calculates the active power of each circuit, idle work(
Rate, power factor (PF)；Voltage class in conjunction with residing for topological island can calculate phase current.
Before carrying out Load flow calculation, following information need to be configured：
1) voltage class information：Whole voltage class voltage values of transforming plant primary equipment.
2) busbar connection type：The busbar wiring information of each voltage class, including it is single busbar, single mother partition, double-bus, double
The common connection type such as mother partition and 3/2 wiring.
3) line information defines：Line information includes circuit types, load proportion and Line Flow direction.Circuit types packet
Two kinds of power circuit and charge circuit are included, power circuit is the trend source of substation, and the trend value of such circuit is Load flow calculation
One of primary condition；Charge circuit refers to the unknown circuit of trend (or main transformer side)；Load proportion refers to charge circuit
Performance number proportion；Line Flow direction refers to pre-set Line Flow direction.
4) power forward direction defines：Power is negative by busbar is flowed into, and outflow busbar is just.
5) real time information：Including breaker, disconnecting switch position, can be obtained from real-time database before calculating every time.
A. line power calculates, including active power, reactive power, power factor (PF).
According to the active power balance on busbar：
Wherein PiFor the total active power in i-th line road in topological island；N is the number of lines in topological island.
According to power circuit active power value, charge circuit load proportion value and direction of tide, each circuit wattful power is calculated
Rate Pi.Similarly, according to the reactive power equilibrium on busbar
In formula, QiFor the total reactive power in i-th line road in topological island；N is the number of lines in topological island.
According to power circuit reactive power value, charge circuit load proportion value and direction of tide, the nothing of each circuit is calculated
Work(power Qi。
The power factor (PF) of circuit is calculated according to total active power of circuit, total reactive power
B. the calculating of phase current
Phase current is calculated according to the total active power, busbar voltage, power factor (PF) of circuit
Wherein U is the specified phase voltage under the voltage class.
Calculate busbar breaker or the electric current on section switch and power
When for single mother partition or double-bus bus-coupled operation, bus connection switch power PconnIt calculates：
PiBy the total active power of circuit that I mothers connect in topological island.
For 3/2 wiring, the circuit breaker current often gone here and there is calculated according to Kirchhoff's current law (KCL).For transformer, work(
Rate loss thinks to be 0, and each side power of main transformer meets power-balance.For two-winding transformer, the power calculation of main transformer side is complete
Cheng Hou, is set as the other side performance number performance number of calculation side, and symbol is opposite；For three-winding transformer, have been calculated
After the power of both sides, according to the power of power equilibrium calculation third side.
During Load flow calculation, when main transformer paired running, the power between main transformer is according to main transformer capacity pro rate；Main transformer point
It is respectively independent to calculate when row operation.
During Load flow calculation, for transformer, power attenuation thinks to be 0, and each side power of main transformer, which meets power-balance, to be wanted
It asks.For two-winding transformer, after the completion of the power calculation of main transformer side, other side performance number is set as the power of calculation side
Value, symbol are opposite；For three-winding transformer, after the power of both sides has been calculated, according to the power of power equilibrium calculation third side.
During Load flow calculation, when mother is in conjunction position, by calculating the line on wherein one section of busbar that mother is connected
Road power and the power for calculating busbar breaker；For 3/2 wiring, often the circuit breaker current on string is fixed according to kirchhoff electric current
Rule calculates.
4. by obtained Load flow calculation data update to real-time database.
5. repeating the above steps after switch changed position or when power circuit trend changes.
Claims (6)
1. a kind of substation simulation tidal current computing method, which is characterized in that the computational methods include the following steps：
1) primary equipment information and primary equipment topological connection relation in substation are obtained；
2) topological island information is generated according to primary equipment topological connection relation and on off state；
3) based on power-balance, power-balance expression formula is established, in conjunction with topological island interior power line power value, charge circuit
Load proportion and direction of tide calculate the active power, reactive power, power factor of each circuit, the voltage in conjunction with residing for topological island
Rating calculation phase current；
4) step 1) -3 is repeated after switch changed position or when power circuit trend changes), the trend of substation is counted again
It calculates；
During the Load flow calculation of the step 3), mother is in wherein one section of mother when closing position, connected by calculating mother
The power of line power and calculating busbar breaker on line；For 3/2 wiring, often the circuit breaker current on string according to Kiel suddenly
Husband's current law calculates.
2. substation simulation tidal current computing method according to claim 1, which is characterized in that the topology island, which refers to, to be connected
Primary equipment set regard busbar as each connection node, for busbar paired running in topological island centered on busbar
Mode, the busbar that bus connection switch is connected are merged into a node；For busbar fanout operation mode, what bus connection switch was connected
Busbar is respectively as independent node.
3. substation simulation tidal current computing method according to claim 2, which is characterized in that the trend meter of the step 3)
During calculation, when main transformer paired running, the power between main transformer is according to main transformer capacity pro rate；When main transformer fanout operation,
It is respectively independent to calculate.
4. substation simulation tidal current computing method according to claim 2, which is characterized in that the trend meter of the step 3)
During calculation, for transformer, power attenuation thinks to be 0, and each side power of main transformer meets power-balance requirement；Double winding is become
Depressor, after the completion of the power calculation of main transformer side, other side performance number is set as the performance number of calculation side, and symbol is opposite；It is right
In three-winding transformer, after the power of both sides has been calculated, according to the power of power equilibrium calculation third side.
5. substation simulation tidal current computing method according to claim 3, which is characterized in that once set in the step 1)
Standby topological connection relation is the primary equipment topology information generated by graphic configuration tool, and every topology information is a node
Information, including the primary equipment ID that is connected of the node and terminal number.
6. substation simulation tidal current computing method according to claim 3, which is characterized in that primary in the step 1)
Facility information includes primary equipment ID number, primary equipment type and the associated flow data of primary equipment.
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| CN106980599B (en) * | 2017-03-16 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Missing data supplementing method and device for scheduling simulation system |
| CN111953071A (en) * | 2020-07-21 | 2020-11-17 | 广东电网有限责任公司 | Intelligent classification statistical method for transformer substation wiring form |
| CN112698584B (en) * | 2020-12-29 | 2024-03-15 | 长沙诺思谱瑞仪器有限公司 | Substation one-key sequential control simulation test method, device, equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101777765A (en) * | 2010-01-27 | 2010-07-14 | 中国电力科学研究院 | On-line load simulation method of power system |
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| CN101777765A (en) * | 2010-01-27 | 2010-07-14 | 中国电力科学研究院 | On-line load simulation method of power system |
Non-Patent Citations (2)
| Title |
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| 变电站微机保护的仿真研究;丁霞梅;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑（月刊）》;20120515(第 05 期);第12、22、32-34页 * |
| 电力网络拓扑分析算法的研究与设计;王曼;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑（月刊）》;20130215(第 02 期);第25、47-49页 * |
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