TWI691144B - Method of transfer supply containing green energy for distribution feeder - Google Patents

Method of transfer supply containing green energy for distribution feeder Download PDF

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TWI691144B
TWI691144B TW108136198A TW108136198A TWI691144B TW I691144 B TWI691144 B TW I691144B TW 108136198 A TW108136198 A TW 108136198A TW 108136198 A TW108136198 A TW 108136198A TW I691144 B TWI691144 B TW I691144B
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feeder
voltage
fault
terminal unit
green energy
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TW202115987A (en
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蔡佳豪
姜政綸
李奕德
劉力源
何元祥
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行政院原子能委員會核能研究所
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

A method of transfer supply is provided for distribution feeder. The transfer supply contains green energy. The method is applied in a dispatch system of distribution feeder. It provides proper transfer-supply paths for feeders and a strategy for voltage adjustment. Through the present invention, a development for integrating the feeder dispatching management platform and the trend analysis program is proposed. Under the selective conditions for transfer supply, allowance adjustment together with voltage, position, and wire loss is considered for green energy while the trend analysis and calculation are provided. Thus, a best method for transfer supply is obtained.

Description

含綠能之配電饋線轉供方法Green energy-containing distribution feeder transfer method

本發明係有關於一種含綠能之配電饋線轉供方法，尤指涉及一種 應用於含綠能的配電饋線調度系統中，特別係指開發整合饋線調度管理平台與潮流分析程式，在轉供之選擇條件下加入含綠能之裕度修正、電壓與位置、及線路損失之潮流分析計算提供，給出一套最佳轉供方法者。 The present invention relates to a green energy-containing distribution feeder transfer method, in particular to a method It is applied to the distribution feeder dispatching system containing green energy, especially refers to the development and integration of the feeder dispatching management platform and power flow analysis program, adding the green energy-containing margin correction, voltage and position, and line loss Power flow analysis and calculation are provided, and a set of best transfer methods are given.

近年來隨著環境永續議題受到高度關注，綠能產業也隨之蓬勃發 展，未來大量綠能將併在饋線上，使得饋線調度成為重要之議題。風力、太陽能等綠能其輸出功率受天候因素影響容易有大幅度變化之情形發生，造成供電品質之不穩定。 In recent years, as the issue of environmental sustainability has received high attention, the green energy industry has also flourished In the future, a lot of green energy will be merged on the feeder in the future, making feeder scheduling an important issue. The output power of green energy such as wind power and solar energy is subject to weather factors, and it is easy to have large-scale changes, resulting in unstable power supply quality.

當饋線故障隔離及上游復電後，需要進行轉供，現有饋線轉供之 用電量計算，皆參考轉供前饋線口量測之負載電流值，但當加入綠能發電後，現有饋線口只能量測到淨負載用電量，而無法代表下游實際負載用電量。第３圖為假設饋線含綠能時，一天24小時之負載變化量。圖中圓點線為一日內太陽能光電（Photovoltaic, PV）發電量，虛線為饋線上實際負載用電量，實線則為量測之淨負載用電量，而點虛線係淨負載用電量加上PV發電量之最大值。 When the feeder fault is isolated and the upstream power is restored, the power supply needs to be transferred. The calculation of power consumption is based on the load current value measured by the feeder port. However, when green power is added, the current feeder port can only measure the net load power consumption, but cannot represent the actual load power consumption downstream. . Figure 3 shows the load variation for 24 hours a day when the feeder contains green energy. The dotted line in the figure is the solar photovoltaic (PV) power generation within one day, the dotted line is the actual load power consumption on the feeder, the solid line is the measured net load power consumption, and the dotted line is the net load power consumption Add the maximum value of PV power generation.

當饋線發生故障後，饋線內之綠能（即PV）將停止發電，實際 負載量大於量測值，故電壓可能過低，低於電業法規定。此時，若單獨以故障前饋線口量測之淨負載電流資訊作為轉供依據，則可能選用容量較小之饋線來轉供，導致饋線裕度不足，故饋線轉供之用電量計算，須考量下游實際負載用電量，以確保饋線順利轉供，提供負載安全用電；當饋線轉供完成後，PV恢復併聯發電，此時又可能造成饋線上之PV併接點電壓過高，超過台電公司再生能源併聯技術要點規範，故須進行饋線轉供後之潮流分析，計算饋線電壓與線路損失，以提供合適的饋線轉供路徑與電壓調整策略。因此，ㄧ般習用者係無法符合使用者於實際使用時之所需。 When the feeder fails, the green energy (PV) in the feeder will stop generating electricity. The load is greater than the measured value, so the voltage may be too low, lower than the provisions of the Electricity Law. At this time, if the net load current information measured at the fault feeder port is used as the basis for the transfer, the feeder with a smaller capacity may be used for the transfer, resulting in insufficient feeder margin. Therefore, the power consumption of the feeder is calculated. It is necessary to consider the actual power consumption of the downstream load to ensure the smooth transfer of the feeder and provide safe power consumption for the load; when the feeder transfer is completed, the PV resumes parallel power generation, which may cause the PV junction voltage on the feeder to be too high. Exceeding the specifications of TEPCO’s renewable energy parallel technology, it is necessary to perform a power flow analysis after feeder conversion to calculate the feeder voltage and line loss to provide an appropriate feeder conversion route and voltage adjustment strategy. Therefore, general users cannot meet the needs of users in actual use.

本發明之主要目的係在於，克服習知技藝所遭遇之上述問題並提 供一種開發整合饋線調度管理平台與潮流分析程式，在轉供之選擇條件下加入含綠能之裕度修正、電壓與位置、及線路損失之潮流分析計算提供，給出最佳轉供路徑之含綠能之配電饋線轉供方法。 The main purpose of the present invention is to overcome the above-mentioned problems encountered by conventional art Provide a development and integration of feeder dispatch management platform and power flow analysis program, add power flow analysis and calculation including margin correction, voltage and position, and line loss under the conditions of transfer, and give the best transfer path Method for transferring feeders with green energy.

本發明之次要目的係在於，提供一種應用於含綠能的配電饋線調 度系統中，並進一步使用實際的配電系統架構進行實現及驗證其饋線轉供技術之含綠能之配電饋線轉供方法。 The secondary objective of the present invention is to provide a power distribution feeder with green energy In the system, and further use the actual distribution system architecture to implement and verify the feeder conversion technology of the feeder conversion method with green energy.

為達以上之目的，本發明係一種含綠能之配電饋線轉供方法，適 用於一含綠能之配電饋線轉供裝置，該含綠能之配電饋線轉供裝置包含數條饋線以及一饋線口資訊終端單元（Feeder Remote Terminal Unit, FRTU），其中每條饋線包含一饋線前端斷路器（Feeder Main Circuit Breaker, FCB）與一保護電驛（Relay）狀態，係透過數個常開開關（SW）作連接，每個開關上皆設有一饋線終端單元（Feeder Terminal Unit, FTU），負責蒐集各開關迴路之狀態及電壓、電流與過電流故障信號之資料，當故障發生時，根據所有饋線終端單元回傳之過電流旗標，判斷出故障點位置，該饋線口資訊終端單元為各該饋線終端單元與一控制中心之間的資料中繼站，可對上游之控制中心與下游之饋線終端單元做資料傳送，所接收資料須在該饋線口資訊終端單元內部先做資料與位址之重整，而通訊採階層之方式，可減少通訊伺服器資料處理量，其中該含綠能之配電饋線轉供方法包含下列步驟：步驟一：提供一系統輸入，其包含饋線前端斷路器與保護電驛狀態、饋線拓樸架構與線路阻抗、饋線終端單元之過電流旗標、綠能裝置容量及其位置、溫度與照度、時間、饋線終端單元之電流與電壓值、以及饋線前端斷路器電壓值之資訊，並以該饋線前端斷路器與保護電驛狀態、該饋線拓樸架構與線路阻抗、及該饋線終端單元之過電流旗標作為啟動一故障偵測、隔離及復電（Fault Detection, Isolation, and Recovery, FDIR）流程所需之資訊，完成上游復電；步驟二：進行下游轉供，依故障區間右邊開關向後找出所有常開點，作為可能之轉供路徑

Figure 02_image001
，其中
Figure 02_image003
為常開點數量且為1～n正整數，並根據該綠能裝置容量及其位置、該溫度與照度、該時間、以及該饋線終端單元之電流與電壓值資訊，推估故障前一刻之下游非故障區各位置綠能發電量
Figure 02_image005
，並計算下游非故障區總電流
Figure 02_image007
，其中
Figure 02_image009
為綠能數量且為1～n正整數；步驟三：以該下游非故障區總電流
Figure 02_image007
，搭配轉供路徑
Figure 02_image011
、待轉供饋線綠能發電量、饋線終端單元電流、饋線前端斷路器電壓、及饋線拓樸架構與線路阻抗，作為裕度修正、電壓與位置的提供、及線損計算之輸入，其中該電壓包含最高電壓V max及最低電壓V min；步驟四：該裕度修正之計算係從第1條轉供路徑
Figure 02_image012
（
Figure 02_image003
=1）計算裕度，若裕度小於或等於0，將會停止計算，並從第2條轉供路徑
Figure 02_image014
計算裕度，若裕度大於0，則至步驟五執行潮流分析計算；步驟五：透過待轉供饋線之饋線前端斷路器電壓及每一具開關本身所帶負載量
Figure 02_image016
，並利用饋線拓樸架構與線路阻抗，進行潮流分析計算；步驟六：當發生故障時，計算綠能恢復供電前的饋線上最低電壓V min及其位置；當綠能恢復併聯發電後，計算饋線上最高電壓V max及其位置、線路損失，計算完後繼續從第2條轉供路徑以步驟四與步驟五重新計算裕度與潮流分析，直到算完最後一條轉供路徑為止；以及步驟七：選定最高電壓V max、最低電壓V min、及線損計算權重，依各項目之重要程度給予權重值，將裕度小於等於0之外的所有轉供路徑
Figure 02_image001
計算完之最高電壓、最低電壓、及線損給分數，並乘上權重值，加總所有轉供路徑
Figure 02_image001
分數，由大排到小，分數最高即為最佳轉供之路徑。 In order to achieve the above purpose, the present invention is a method for transferring feeders containing green energy, which is suitable for a device for transferring feeders containing green energy. The device for transferring feeders containing green energy includes several feeders and a feeder Feeder Remote Terminal Unit (FRTU), where each feeder includes a feeder front circuit breaker (Feeder Main Circuit Breaker, FCB) and a protection relay (Relay) status, through a number of normally open switches (SW ) For connection, each switch is equipped with a Feeder Terminal Unit (FTU), which is responsible for collecting the status of each switch circuit and the data of voltage, current and overcurrent fault signals. When a fault occurs, according to all feeder terminals The overcurrent flag returned by the unit determines the location of the fault point. The feeder port information terminal unit is a data relay station between each feeder terminal unit and a control center. It can be used for the upstream control center and the downstream feeder terminal unit. For data transmission, the received data must be reorganized in the information terminal unit of the feeder port first. The communication adopts a hierarchical method to reduce the data processing volume of the communication server. The supply method includes the following steps: Step 1: Provide a system input, which includes feeder front-end circuit breaker and protection relay status, feeder topology and line impedance, feeder terminal unit overcurrent flag, green energy device capacity and location , Temperature and illuminance, time, the current and voltage values of the feeder terminal unit, and the voltage value of the feeder front-end circuit breaker, and the status of the feeder front-end circuit breaker and protection relay, the feeder topology and line impedance, and the The overcurrent flag of the feeder terminal unit is used as the information needed to start a Fault Detection, Isolation, and Recovery (FDIR) process to complete the upstream power recovery; Step two: carry out downstream supply, according to The switch on the right side of the fault zone finds all normally open points backwards as possible transfer paths
Figure 02_image001
,among them
Figure 02_image003
It is the number of normally open points and is a positive integer from 1 to n. According to the capacity of the green energy device and its location, the temperature and illuminance, the time, and the current and voltage values of the feeder terminal unit, the moment before the fault is estimated Green power generation at each location in the downstream non-fault zone
Figure 02_image005
And calculate the total current in the downstream non-fault zone
Figure 02_image007
,among them
Figure 02_image009
Is the amount of green energy and is a positive integer from 1 to n; Step 3: The total current in the downstream non-fault zone
Figure 02_image007
, With the transfer path
Figure 02_image011
, Green power generation capacity of feeder to be transferred, feeder terminal unit current, feeder front-end circuit breaker voltage, and feeder topology and line impedance, as input for margin correction, voltage and position provision, and line loss calculation, of which The voltage includes the highest voltage V max and the lowest voltage V min ; Step 4: The calculation of the margin correction is transferred from the first supply path
Figure 02_image012
(
Figure 02_image003
=1) Calculate the margin, if the margin is less than or equal to 0, the calculation will be stopped and the supply path will be transferred from the second
Figure 02_image014
Calculate the margin. If the margin is greater than 0, go to Step 5 to perform the power flow analysis calculation; Step 5: Through the front-end circuit breaker voltage of the feeder to be transferred to the feeder and the load carried by each switch itself
Figure 02_image016
, And use the feeder topology and line impedance to carry out power flow analysis and calculation; Step 6: When a fault occurs, calculate the minimum voltage V min and its position on the feeder before green energy recovery power supply; after green energy recovery parallel generation, calculate The maximum voltage V max on the feeder and its location and line loss, after calculation, continue to recalculate the margin and power flow analysis from the second transfer path in steps 4 and 5 until the last transfer path is calculated; and steps Seven: Select the highest voltage V max , the lowest voltage V min , and the line loss to calculate the weight, give the weight value according to the importance of each item, and all the transfer routes except the margin less than or equal to 0
Figure 02_image001
The calculated maximum voltage, minimum voltage, and line loss are given to the score, and multiplied by the weight value to add up all the transfer paths
Figure 02_image001
The scores are arranged from large to small, and the highest score is the best route for re-supply.

於本發明上述實施例中，每個開關係包含常開開關與常閉開關。In the above embodiments of the present invention, each open relationship includes a normally open switch and a normally closed switch.

於本發明上述實施例中，該步驟一FDIR流程包括下列子步驟： 子步驟一：該保護電驛作動使該饋線前端斷路器打開；子步驟二：依該饋線終端單元過電流旗標判斷決定饋線故障區間；子步驟三：下令開啟故障區間前後自動化開關以隔離故障區間；以及子步驟四：該保護電驛復歸及該饋線前端斷路器投入，完成上游復電。 In the above embodiment of the present invention, this step-FDIR process includes the following sub-steps: Substep 1: The protection relay operates to open the front-end circuit breaker of the feeder; Substep 2: Determine the feeder fault interval according to the overcurrent flag of the feeder terminal unit; Substep 3: Order the automatic switch before and after opening the fault interval to isolate the fault Section; and sub-step four: the protection relay resets and the feeder front-end circuit breaker is put into operation to complete the upstream reset.

於本發明上述實施例中，該步驟二計算下游非故障區總電流之公 式如下：

Figure 02_image018
，
Figure 02_image020
； 其中
Figure 02_image022
為故障下游由饋線終端單元提供之電壓值。 In the above embodiment of the present invention, the formula for calculating the total current in the downstream non-fault zone in step 2 is as follows:
Figure 02_image018
,
Figure 02_image020
; among them
Figure 02_image022
The voltage value provided by the feeder terminal unit downstream of the fault.

於本發明上述實施例中，該步驟四計算裕度公式如下：

Figure 02_image024
； 其中
Figure 02_image026
為待轉供饋線口電流值，
Figure 02_image028
為故障下游由饋線終端單元提供之電流值。 In the above embodiment of the present invention, the step 4 calculation margin formula is as follows:
Figure 02_image024
; among them
Figure 02_image026
For the current value of the feeder port to be transferred,
Figure 02_image028
The current value provided by the feeder terminal unit downstream of the fault.

於本發明上述實施例中，該步驟五計算第k具開關本身所帶負載 量

Figure 02_image030
公式如下：
Figure 02_image032
； 其中
Figure 02_image034
為第k具開關本身及下游所帶負載量，
Figure 02_image036
為第k+1具開關本身及下游所帶負載量。 In the above embodiment of the present invention, the fifth step calculates the load of the k-th switch itself
Figure 02_image030
The formula is as follows:
Figure 02_image032
; among them
Figure 02_image034
For the load of the k-th switch itself and downstream,
Figure 02_image036
It is the load of the switch k+1 and its downstream.

於本發明上述實施例中，該步驟七係由使用者決定各項目之重要 程度，依各項目之重要程度給予較高權重值。 In the above embodiment of the present invention, step 7 is for the user to determine the importance of each item The degree is given a higher weight value according to the importance of each item.

為使貴審查委員能對本發明之特徵、目的及功能有更進一步的認 知與瞭解，茲藉由下文之實施方式對本發明之細部結構以及設計的理念原由進行說明，以使得審查委員可以了解本發明之特點。 In order for your review committee to have a further understanding of the features, purposes and functions of the present invention Knowing and understanding, the detailed structure and design reason of the present invention are explained by the following embodiments, so that the examination committee can understand the characteristics of the present invention.

請參閱『第１圖及第２圖』所示，係分別為本發明之饋線架構故 障示意圖、以及本發明含綠能之配電饋線轉供方法流程示意圖。如圖所示：本 發明為使用於配電調度管理系統之饋線轉供技術，希望達到強化管理綠能及饋線調度運轉之目的，使配電饋線調度管理更具擴充彈性，便以第２圖之饋線架構示意圖，說明本發明所提一種含綠能之配電饋線轉供方法之流程，其架構有三條饋線１、２、３以及一饋線口資訊終端單元（Feeder Remote Terminal Unit, FRTU）４，其中每條饋線１、２、３包含一饋線前端斷路器（Feeder Main Circuit Breaker, FCB）１１、２１、３１與一保護電驛（Relay）１２、２２、３２狀態，透過數個常開開關ＳＷ３、ＳＷ５作連接，每個開關ＳＷ１～ＳＷ６（包含常開開關ＳＷ３、ＳＷ５與常閉開關ＳＷ１、ＳＷ２、ＳＷ４、ＳＷ６）上皆設有一饋線終端單元（Feeder Terminal Unit, FTU）ＦＴＵ１～ＦＴＵ６，負責蒐集各開關迴路之狀態及電壓、電流與過電流故障信號之資料，當故障發生時，根據所有饋線終端單元ＦＴＵ１～ＦＴＵ６回傳之過電流旗標，判斷出故障點位置。該饋線口資訊終端單元４為各該饋線終端單元ＦＴＵ１～ＦＴＵ６與一控制中心（圖中未示）之間的資料中繼站，可對上游之控制中心與下游之饋線終端單元ＦＴＵ１～ＦＴＵ６做資料傳送，所接收資料須在該饋線口資訊終端單元４內部先做資料與位址之重整，而通訊採階層之方式，可減少通訊伺服器資料處理量，如第１圖中實線為實際饋線，虛線為通訊線。本方法流程如第２圖所示，包含下列步驟： Please refer to "Figure 1 and Figure 2", which are the feeder architecture of the present invention. Schematic diagram of the fault, and the schematic flow chart of the method for transferring the feeder with green energy in the present invention. As shown: this The invention is a feeder transfer technology used in a power distribution dispatch management system, hoping to achieve the purpose of strengthening the management of green energy and feeder dispatch operation, and making the distribution feeder dispatch management more expandable and flexible. The proposed process of a green energy-containing distribution feeder transfer method has three feeders 1, 2, 3 and a feeder remote terminal unit (FRTU) 4, in which each feeder 1, 2, 3. Contains a feeder front circuit breaker (Feeder Main Circuit Breaker, FCB) 11, 21, 31 and a protection relay (Relay) 12, 22, 32 state, through several normally open switches SW3, SW5 for connection, each switch Feeder terminal unit (FTU) FTU1~FTU6 are set on SW1～SW6 (including normally open switches SW3, SW5 and normally closed switches SW1, SW2, SW4, SW6), responsible for collecting the status and voltage of each switch circuit 1. The current and overcurrent fault signal data, when a fault occurs, according to the overcurrent flag returned by all feeder terminal units FTU1~FTU6, determine the location of the fault point. The feeder port information terminal unit 4 is a data relay station between each of the feeder terminal units FTU1~FTU6 and a control center (not shown), which can transmit data to the upstream control center and the downstream feeder terminal units FTU1~FTU6 The received data must be reorganized in the information terminal unit 4 of the feeder port first, and the data and address are reorganized. The communication adopts a hierarchical method to reduce the data processing amount of the communication server. The solid line in Figure 1 is the actual feeder , The dotted line is the communication line. The flow of this method is shown in Figure 2 and includes the following steps:

步驟s11～s18：提供一系統輸入，其包含饋線前端斷路器與保護 電驛狀態、饋線拓樸架構與線路阻抗、饋線終端單元之過電流旗標、綠能裝置容量及其位置、溫度與照度、時間、饋線終端單元之電流與電壓值、以及饋線前端斷路器電壓值等資訊。首先，以步驟s11～s13饋線前端斷路器與保護電驛狀態、饋線拓樸架構與線路阻抗、及饋線終端單元之過電流旗標作為啟動步驟s19故障偵測、隔離及復電（Fault Detection, Isolation, and Recovery, FDIR）流程所需之資訊。本發明以第２圖進行FDIR說明，饋線１於匯流排ＢＵＳ３位置發生故障，步驟s19的子步驟流程如下： 子步驟s191：該保護電驛１２作動使該饋線前端斷路器１１打開。 子步驟s192：判斷饋線故障，並依該饋線終端單元ＦＴＵ過電流旗標決定故障區間。如第１圖所示，饋線終端單元ＦＴＵ１過電流旗標為1，其餘饋線終端單元ＦＴＵ２～６過電流旗標為0。 子步驟s193：下令開啟故障區間前後自動化開關ＳＷ１與ＳＷ２以隔離故障區間。 子步驟s194：復歸該保護電驛１２及投入該饋線前端斷路器１１，完成上游復電。 Steps s11 ~ s18: Provide a system input, which includes feeder front-end circuit breaker and protection Relay status, feeder topology and line impedance, overcurrent flag of feeder terminal unit, capacity and position of green energy device, temperature and illuminance, time, current and voltage value of feeder terminal unit, and feeder front-end circuit breaker voltage Value and other information. First, the steps s11～s13 of the feeder front-end circuit breaker and protection relay status, feeder topology and line impedance, and the overcurrent flag of the feeder terminal unit are used as the starting step s19 fault detection, isolation and power recovery (Fault Detection, Isolation, and Recovery, FDIR). In the present invention, the FDIR is described with reference to Fig. 2. The feeder 1 fails at the position of bus BUS3. The sub-step flow of step s19 is as follows: Substep s191: The protection relay 12 actuates to open the front-end circuit breaker 11 of the feeder. Sub-step s192: determine the feeder fault, and determine the fault interval according to the FTU overcurrent flag of the feeder terminal unit. As shown in Figure 1, the overcurrent flag of the feeder terminal unit FTU1 is 1, and the overcurrent flag of the remaining feeder terminal units FTU2 to 6 is 0. Substep s193: Order to open the automatic switch SW1 and SW2 before and after the fault interval to isolate the fault interval. Sub-step s194: reset the protection relay 12 and put the feeder front-end circuit breaker 11 to complete the upstream reset.

當上游復電完成後，後續進行下游轉供，於步驟s20依故障區間 右邊開關（以第１圖為例係依開關ＳＷ２）向後找出所有常開點，作為可能之轉供路徑

Figure 02_image001
，其中
Figure 02_image003
為常開點數量且為1～n正整數。同時，根據步驟s14綠能裝置容量及其位置、步驟s15溫度與照度、步驟s16時間、以及步驟s17饋線終端單元之電流與電壓值資訊，於步驟s21推估故障前一刻之下游非故障區各位置綠能發電量
Figure 02_image005
，其中
Figure 02_image009
為綠能數量且為1～n正整數，並於步驟s22計算下游非故障區總電流
Figure 02_image007
，其計算公式如下；
Figure 02_image018
式(1)
Figure 02_image020
式(2) 其中
Figure 02_image022
為故障下游由饋線終端單元提供之電壓值。 After the upstream power restoration is completed, the downstream transfer is carried out. In step s20, all the normally open points are found backward according to the switch on the right side of the fault section (take the switch SW2 in the example of Figure 1) as the possible transfer path.
Figure 02_image001
,among them
Figure 02_image003
It is the number of normally open points and is a positive integer from 1 to n. At the same time, according to the capacity and position of the green energy device in step s14, the temperature and illuminance in step s15, the time in step s16, and the current and voltage values of the feeder terminal unit in step s17, the downstream non-fault areas immediately before the fault are estimated in step s21. Location Green Power Generation
Figure 02_image005
,among them
Figure 02_image009
Is the amount of green energy and is a positive integer from 1 to n, and the total current in the downstream non-fault zone is calculated in step s22
Figure 02_image007
, The calculation formula is as follows;
Figure 02_image018
Formula 1)
Figure 02_image020
Formula (2) where
Figure 02_image022
The voltage value provided by the feeder terminal unit downstream of the fault.

算完下游非故障區總電流

Figure 02_image007
，於步驟S23搭配轉供路徑
Figure 02_image011
、待轉供饋線綠能發電量、饋線終端單元電流、饋線前端斷路器電壓、及饋線拓樸架構與線路阻抗，作為裕度修正、電壓（包含最高電壓V max及最低電壓V min）與位置的提供、及線損計算之輸入。 Calculate the total current in the downstream non-fault zone
Figure 02_image007
, In step S23 with the transfer route
Figure 02_image011
, Green power generation capacity of feeder to be transferred, feeder terminal unit current, feeder front-end circuit breaker voltage, feeder topology and line impedance, as margin correction, voltage (including maximum voltage V max and minimum voltage V min ) and location The provision of, and input of line loss calculation.

步驟s24、s25執行裕度計算，從第1條轉供路徑

Figure 02_image012
（
Figure 02_image003
=1）計算 裕度，公式如下：
Figure 02_image024
式(3) 其中
Figure 02_image026
為待轉供饋線口電流值，
Figure 02_image028
為故障下游由饋線終端單元提供之電流值。 Steps s24 and s25 perform margin calculation and transfer from the first supply path
Figure 02_image012
(
Figure 02_image003
=1) To calculate the margin, the formula is as follows:
Figure 02_image024
Formula (3) where
Figure 02_image026
For the current value of the feeder port to be transferred,
Figure 02_image028
The current value provided by the feeder terminal unit downstream of the fault.

算完裕度至步驟s26進行判斷，若裕度小於或等於0，將會停止計 算，並從步驟s27以第2條轉供路徑

Figure 02_image014
回步驟s25計算裕度，若裕度大於0，則至步驟s28執行潮流分析計算。 After calculating the margin to step s26, if the margin is less than or equal to 0, the calculation will be stopped, and the second route will be transferred from step s27.
Figure 02_image014
Return to step s25 to calculate the margin. If the margin is greater than 0, go to step s28 to perform power flow analysis and calculation.

步驟s28潮流分析計算使用到之參數包含待轉供饋線之饋線前端 斷路器電壓及每一具開關ＳＷ本身所帶負載量

Figure 02_image016
，並利用饋線拓樸架構與線路阻抗，進行潮流分析計算。第k具開關ＳＷ本身所帶負載量
Figure 02_image030
計算公式如下：
Figure 02_image032
式(4) 其中
Figure 02_image034
為第k具開關ＳＷ本身及下游所帶負載量，
Figure 02_image036
為第k+1具開關ＳＷ 本身及下游所帶負載量。 Step s28 The parameters used in the power flow analysis calculation include the front-end circuit breaker voltage of the feeder to be transferred to the feeder and the load carried by each switch SW itself
Figure 02_image016
, And use feeder topology and line impedance for power flow analysis and calculation. The load of the k-th switch SW itself
Figure 02_image030
Calculated as follows:
Figure 02_image032
Formula (4) where
Figure 02_image034
For the load of the kth switch SW itself and downstream,
Figure 02_image036
For the k+1th switch SW itself and the downstream load.

當發生故障時，饋線完全沒電，此時綠能不會立即發電，實際負 載量大於量測值，電壓可能過低，故以步驟s29計算綠能恢復供電前的饋線上最低電壓V min及其位置；當綠能恢復併聯發電後，此時又可能造成饋線上之綠能併接點電壓過高，超過台電再生能源併聯技術要點規範，故以步驟s30、s31計算饋線上最高電壓V max及其位置、線路損失。計算完後由步驟s32繼續從第2條轉供路徑經步驟s33之判斷以步驟s25與步驟s28重新計算裕度與潮流分析，直到算完最後一條轉供路徑為止。 When a fault occurs, the feeder is completely de-energized. At this time, the green energy will not be generated immediately. The actual load is greater than the measured value, and the voltage may be too low. Therefore, the minimum voltage V min and the minimum voltage on the feeder before the green energy is restored is calculated in step s29 Its position; when the green energy resumes parallel power generation, the voltage of the green energy parallel contact on the feeder may be too high at this time, which exceeds the Taipower renewable energy parallel technical specifications. Therefore, the maximum voltage V max on the feeder is calculated by steps s30 and s31 And its location and line loss. After the calculation is completed, step s32 continues to judge the second transfer route through step s33, and then recalculates the margin and power flow analysis in steps s25 and s28 until the last transfer route is calculated.

算完後進入步驟s34，選定最高電壓V max、最低電壓V min、及線損 計算權重，由使用者決定各項目之重要程度，依各項目之重要程度給予較高權重值。於步驟s35將裕度小於等於0之外的所有轉供路徑

Figure 02_image001
計算完之最高電壓、最低電壓、及線損給分數，並乘上權重值，最後於步驟s36、s37加總所有轉供路徑
Figure 02_image001
分數，由大排到小，分數最高即為最佳轉供之路徑，藉此給出最佳轉供方法。 After the operator proceeds to step S34, the selected maximum voltage V max, the minimum voltage V min, and calculating the weight loss of the line, the degree of importance of each item by a user decided to give higher weight value of the weight of each item in order of importance. In step s35, all the transfer routes except the margin less than or equal to 0
Figure 02_image001
Calculate the highest voltage, the lowest voltage, and the line loss to the score, multiply the weight value, and finally add all the transfer paths in steps s36 and s37
Figure 02_image001
The scores are arranged from large to small, and the highest score is the path of the best transfer, thereby giving the best transfer method.

本發明目前已於饋線調度模擬平台建立含綠能資訊之台電雲林 區處實際饋線拓樸架構，並整合配電潮流計算程式，完成台電雲林區處實際饋線之各位置發生故障之模擬，執行FDIR功能，提出含綠能之裕度修正、電壓與位置、及線路損失之轉供方法驗證，並於台電雲林區處上線供調度員使用。 The present invention has established a Taipower cloud forest containing green energy information on a feeder dispatch simulation platform Topological structure of the actual feeder at the district, and integration of the power flow calculation program to complete the simulation of the failure of each position of the actual feeder at the Yunlin District of Taipower, perform the FDIR function, and propose the margin correction with green energy, voltage and location, and line The loss transfer method was verified, and it was launched at the Tailin Yunlin District for dispatchers to use.

透過本發明所提含綠能之配電饋線轉供方法，可提供合適的饋線 轉供路徑與電壓調整策略。當加入綠能發電後，現有饋線口只能量測到淨負載用電量，而無法代表下游實際負載用電量，則可能使饋線無法順利轉供；綠能併於饋線末端時，故障發生可能造成線路末端電壓過高或過低，影響電氣設備安全。因此，本發明提出開發整合饋線調度管理平台與潮流分析程式，在轉供之選擇條件下加入含綠能之裕度修正、電壓及位置、與線路損失之潮流分析計算提供，給出一套最佳轉供方法。 Through the method for transferring green power-containing distribution feeder provided by the present invention, a suitable feeder can be provided Transfer route and voltage adjustment strategy. After adding green energy generation, the existing feeder port can only measure the net load power consumption, but can not represent the actual power consumption of the downstream load, which may prevent the feeder from smoothly transferring; when green energy is at the end of the feeder, a fault occurs The voltage at the end of the line may be too high or too low, affecting the safety of electrical equipment. Therefore, the present invention proposes to develop an integrated feeder dispatch management platform and power flow analysis program, add power flow analysis calculation calculations including green energy margin correction, voltage and position, and line loss under the selection conditions of transfer, and give a set of most Best transfer method.

綜上所述，本發明係一種含綠能之配電饋線轉供方法，可有效改 善習用之種種缺點，開發整合饋線調度管理平台與潮流分析程式，在轉供之選 擇條件下加入含綠能之裕度修正、電壓及位置、與線路損失之潮流分析計算提供，給出一套最佳轉供方法，進而使本發明之產生能更進步、更實用、更符合使用者之所須，確已符合發明專利申請之要件，爰依法提出專利申請。 In summary, the present invention is a method for transferring feeders containing green energy, which can be effectively modified Various shortcomings of good practice, development and integration of feeder dispatch management platform and power flow analysis program Adding the marginal correction with green energy, voltage and position, and power loss analysis and calculation of the line loss under selected conditions, and providing a set of best transfer methods, so that the production of the present invention can be more advanced, more practical, and more in line with The user's needs have indeed met the requirements for the invention patent application, and the patent application is filed in accordance with the law.

惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定 本發明實施之範圍；故，凡依本發明申請專利範圍及發明說明書內容所作之簡單的等效變化與修飾，皆應仍屬本發明專利涵蓋之範圍內。 However, the above are only the preferred embodiments of the present invention, which should not be limited by this The scope of implementation of the present invention; therefore, any simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the description of the invention should still fall within the scope of the invention patent.

１、２、３:饋線 １１、２１、３１:饋線前端斷路器 １２、２２、３２:保護電驛 ４:饋線口資訊終端單元 ＳＷ１～ＳＷ６:開關 ＦＴＵ１～ＦＴＵ６:饋線終端單元 ＢＵＳ１～１０:匯流排 s11～s37:步驟 s191～s194:子步驟 1, 2, 3: feeder 11, 21, 31: feeder front-end circuit breaker 12, 22, 32: protection relay 4: Feeder port information terminal unit SW1～SW6: switch FTU1～FTU6: feeder terminal unit BUS1～10: busbar s11～s37: steps s191～s194: substep

第１圖，係本發明之饋線架構故障示意圖。 第２圖，係本發明含綠能之配電饋線轉供方法流程示意圖。 第３圖，係假設饋線含綠能時之一天中負載變化量示意圖。 Figure 1 is a schematic diagram of the fault of the feeder architecture of the present invention. Fig. 2 is a schematic flow chart of the method for transferring feeders containing green energy in the present invention. Figure 3 is a schematic diagram of load variation during a day when the feeder contains green energy.

s11~s37:步驟 s11~s37: steps

s191~s194:子步驟 s191~s194: substep

Claims (6)

一種含綠能之配電饋線轉供方法，適用於一含綠能之配電饋線轉供裝置，該含綠能之配電饋線轉供裝置包含數條饋線以及一饋線口資訊終端單元(Feeder Remote Terminal Unit,FRTU)，其中每條饋線包含一饋線前端斷路器(Feeder Main Circuit Breaker,FCB)與一保護電驛(Relay)狀態，係透過數個常開開關(SW)作連接，每個常開與常閉之開關上皆設有一饋線終端單元(Feeder Terminal Unit,FTU)，負責蒐集各開關迴路之狀態及電壓、電流與過電流故障信號之資料，當故障發生時，根據所有饋線終端單元回傳之過電流旗標，判斷出故障點位置，該饋線口資訊終端單元為各該饋線終端單元與一控制中心之間的資料中繼站，可對上游之控制中心與下游之饋線終端單元做資料傳送，所接收資料須在該饋線口資訊終端單元內部先做資料與位址之重整，而通訊採階層之方式，可減少通訊伺服器資料處理量，其中該含綠能之配電饋線轉供方法包含下列步驟：步驟一：提供一系統輸入，其包含饋線前端斷路器與保護電驛狀態、饋線拓樸架構與線路阻抗、饋線終端單元之過電流旗標、綠能裝置容量及其位置、溫度與照度、時間、饋線終端單元之電流與電壓值、以及饋線前端斷路器電壓值之資訊，並以該饋線前端斷路器與保護電驛狀態、該饋線拓樸架構與線路阻抗、及該饋線終端單元之過電流旗標作為啟動一故障偵測、隔離及復電(Fault Detection,Isolation,and Recovery,FDIR)流程所需之資訊，完成上游復電； 步驟二：進行下游轉供，依故障區間右邊開關向後找出所有常開點，作為可能之轉供路徑LT i ，其中i為常開點數量且為1~n正整數，並根據該綠能裝置容量及其位置、該溫度與照度、該時間、以及該饋線終端單元之電流與電壓值資訊，推估故障前一刻之下游非故障區各位置綠能發電量P renew,j ，並計算下游非故障區總電流I renew,total ，其中j為綠能數量且為1~n正整數；步驟三：以該下游非故障區總電流I renew,total ，搭配轉供路徑LT i 、待轉供饋線綠能發電量、饋線終端單元電流、饋線前端斷路器電壓、及饋線拓樸架構與線路阻抗，作為裕度修正、電壓與位置的提供、及線損計算之輸入，其中該電壓包含最高電壓Vmax及最低電壓Vmin；步驟四：該裕度修正之計算係從第1條轉供路徑LT 1 (i=1)計算裕度，若裕度小於或等於0，將會停止計算，並從第2條轉供路徑LT 2 計算裕度，若裕度大於0，則至步驟五執行潮流分析計算；步驟五：透過待轉供饋線之饋線前端斷路器電壓及每一具開關本身所帶負載量P load ，並利用饋線拓樸架構與線路阻抗，進行潮流分析計算；步驟六：當發生故障時，計算綠能恢復供電前的饋線上最低電壓Vmin及其位置；當綠能恢復併聯發電後，計算饋線上最高電壓Vmax及其位置、線路損失，計算完後繼續從第2條轉供路徑以步驟四與步驟五重新計算裕度與潮流分析，直到算完最後一條轉供路徑為止；以及步驟七：選定最高電壓Vmax、最低電壓Vmin、及線損計算權重，依各項目之重要程度給予權重值，將裕度小於等於0之外的所有轉供 路徑LT i 計算完之最高電壓、最低電壓、及線損給分數，並乘上權重值，加總所有轉供路徑LT i 分數，由大排到小，分數最高即為最佳轉供之路徑。 A green energy-containing distribution feeder transfer method is suitable for a green energy-containing distribution feeder transfer device. The green energy-containing distribution feeder transfer device includes several feeders and a feeder remote terminal unit (Feeder Remote Terminal Unit) , FRTU), where each feeder includes a feeder front circuit breaker (Feeder Main Circuit Breaker, FCB) and a protection relay (Relay) state, which is connected through several normally open switches (SW), each normally open and A feeder terminal unit (FTU) is set on the normally closed switch, which is responsible for collecting the status of each switch circuit and the data of voltage, current and overcurrent fault signals. When a fault occurs, it is returned according to all feeder terminal units The overcurrent flag determines the location of the fault point. The feeder port information terminal unit is a data relay station between each feeder terminal unit and a control center, which can transmit data to the upstream control center and the downstream feeder terminal unit. The received data must be reorganized in the feeder port information terminal unit first, and the data is reorganized in a hierarchical manner to reduce the data processing volume of the communication server. The green energy-containing distribution feeder transfer method includes The following steps: Step 1: Provide a system input, including feeder front-end circuit breaker and protection relay status, feeder topology and line impedance, feeder terminal unit overcurrent flag, green energy device capacity and its location, temperature and Illumination, time, current and voltage values of the feeder terminal unit, and the voltage value of the feeder front-end circuit breaker, and based on the state of the feeder front-end circuit breaker and protection relay, the feeder topology and line impedance, and the feeder terminal unit The over-current flag is used as the information needed to start a fault detection, isolation, and recovery (FDIR) process to complete the upstream recovery; Step 2: Perform downstream transfer, according to the right side of the fault section The switch finds all normally open points backwards as possible transfer routes LT i , where i is the number of normally open points and is a positive integer from 1 to n, and according to the capacity of the green energy device and its position, the temperature and the illuminance, the Time, and the current and voltage information of the feeder terminal unit, estimate the green energy generation amount P renew,j at each position of the downstream non-fault zone immediately before the fault, and calculate the total current I renew,total of the downstream non-fault zone, where j It is the quantity of green energy and a positive integer from 1 to n; Step 3: Use the total current I renew, total of the downstream non-fault area, with the transfer path LT i , the green power generation capacity of the feeder to be transferred, the current of the feeder terminal unit, the feeder The front-end circuit breaker voltage, feeder topology and line impedance are used as inputs for margin correction, voltage and position provision, and line loss calculation, where the voltage includes the highest voltage V max and the lowest voltage V min ; step four: the The calculation of the margin correction is transferred from the first supply path LT 1 ( i =1) Calculate the margin. If the margin is less than or equal to 0, the calculation will be stopped and the margin will be calculated from the second route LT 2. If the margin is greater than 0, go to step 5 to perform the power flow analysis Calculation; Step 5: Use the feeder front-end circuit breaker voltage to be transferred to the feeder and the load P load of each switch, and use the feeder topology and line impedance to perform power flow analysis and calculation; Step 6: When a fault occurs At the time, calculate the lowest voltage V min and its position on the feeder before the green energy recovery; when the green energy resumes parallel generation, calculate the highest voltage V max on the feeder and its location, line loss, after the calculation, continue to transfer from the second For the supply path, recalculate the margin and power flow analysis in steps 4 and 5 until the last transfer path is calculated; and step 7: select the highest voltage V max , the lowest voltage V min , and the line loss calculation weight, according to each item The weight value is given to the importance degree, and the highest voltage, the lowest voltage, and the line loss calculated for all the transfer routes LT i except the margin less than or equal to 0 are given to the score, and multiplied by the weight value to add up all the transfer routes LT i The scores are arranged from large to small, and the highest score is the best route for re-supply. 依申請專利範圍第1項所述之含綠能之配電饋線轉供方法，其中，該步驟一FDIR流程包括下列子步驟：子步驟一：該保護電驛作動使該饋線前端斷路器打開；子步驟二：依該饋線終端單元過電流旗標判斷決定饋線故障區間；子步驟三：下令開啟故障區間前後自動化開關以隔離故障區間；以及子步驟四：該保護電驛復歸及該饋線前端斷路器投入，完成上游復電。 The green energy distribution feeder transfer method described in item 1 of the patent scope, wherein the step 1 FDIR process includes the following sub-steps: sub-step 1: the protection relay operates to open the feeder front-end circuit breaker; Step 2: Determine the feeder fault interval according to the overcurrent flag of the feeder terminal unit; substep 3: order to open the automatic switch before and after the fault interval to isolate the fault interval; and substep 4: the protection relay reset and the feeder front-end circuit breaker Invest to complete the upstream power restoration. 依申請專利範圍第1項所述之含綠能之配電饋線轉供方法，其中，該步驟二計算下游非故障區總電流之公式如下：
Figure 108136198-A0305-02-0014-3
 其中V SW2 為故障下游由饋線終端單元提供之電壓值。 According to the green power distribution feeder transfer method described in item 1 of the patent application scope, in this step 2, the formula for calculating the total current in the downstream non-fault zone is as follows:
Figure 108136198-A0305-02-0014-3
 Where V SW2 is the voltage value provided by the feeder terminal unit downstream of the fault. 依申請專利範圍第1項所述之含綠能之配電饋線轉供方法，其中，該步驟四計算裕度公式如下：裕度=饋線耐流-(I i +I SW +I rene,twota )，其中I i 為待轉供饋線口電流值，I SW2 為故障下游由饋線終端單元提供之電流值。 According to the method described in item 1 of the patent application scope for green energy-containing distribution feeder transfer, where the step 4 calculation margin formula is as follows: Margin = feeder current resistance-( I i + I SW + I rene, twota ) , Where I i is the current value of the feeder port to be transferred, and I SW2 is the current value provided by the feeder terminal unit downstream of the fault. 依申請專利範圍第1項所述之含綠能之配電饋線轉供方法，其中，該步驟五計算第k具開關本身所帶負載量P load,k 公式如下：P load,k =P SW,k -P SW,k+1，其中P SW,k 為第k具開關本身及下游所帶負載量，P SW,k+1 為第k+1具開關本身及下游所帶負載量。 According to the green power distribution feeder transfer method described in item 1 of the patent scope, in step 5, the load of the kth switch itself, P load,k is calculated as follows: P load,k = P SW, k - P SW,k +1 , where P SW,k is the load of the k-th switch itself and the downstream load, P SW,k + 1 is the load of the k-th switch itself and the downstream load. 依申請專利範圍第1項所述之含綠能之配電饋線轉供方法，其中，該步驟七係由使用者決定各項目之重要程度，依各項目之重要程度給予較高權重值。 According to the green power distribution feeder transfer method described in item 1 of the scope of the patent application, in this step 7, the user determines the importance of each project and gives a higher weight value according to the importance of each project.
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