基于ATP-EMTP的330 kV空載線路合閘過電壓仿真分析

 

王國(guó)林

（國(guó)網(wǎng)四川省電力公司德陽供電公司，四川 德陽 618000）

 

    摘 要：利用ATP-EMTP軟件，建模、計(jì)算和分析了不同合閘電阻、合閘電阻接入時(shí)間、合閘相位和殘余電荷對(duì)三相同期合330 kV空載線路過電壓的影響，得出合閘電阻、合閘電阻接入時(shí)間、合閘相位、殘余電荷對(duì)三相同期合空載線路的操作過電壓都有不同程度的影響。指出在電力系統(tǒng)輸配電送電操作中，盡量避免對(duì)空載線路進(jìn)行合閘，有條件的可采用零起升壓對(duì)空載線路充電；在不清楚線路是否空載合閘時(shí)，為降低合空載線路引起的過電壓，應(yīng)將空載線路上的殘余電荷釋放，合閘開關(guān)并聯(lián)接入適當(dāng)?shù)暮祥l電阻，合閘電阻調(diào)整到合理的接入時(shí)間，合閘相位控制在90°左右。

    關(guān)鍵詞：空載線路；合閘過電壓；ATP-EMTP；合閘電阻；殘余電荷

    中圖分類號(hào)：TM726.3     文獻(xiàn)標(biāo)識(shí)碼：A     文章編號(hào)：1007-3175(2019)11-0034-04

    Abstract: This paper used the software ATP-EMT to model, calculate and analyze the influences on the overvoltage of 330 kV no-load line under different closing resistances, closing times, closing phases and residual charges. It is concluded that the switching resistance, the switching time, the switching phase and the residual charge all have different effects on the operating overvoltage of no-load lines. It is pointed out that in the power system transmission and distribution operation, the operator should try to avoid closing the no-load lines and to use the zero booster to charge the no-load line when conditions permitted; when it is not clear whether the circuit is closed without load, in order to reduce the overvoltage caused by the closing no-load circuit, the residual charge on the no-load circuit should be released; the closing switch should be connected with appropriate closing resistance in parallel; the closing resistance should be adjusted to a reasonable access time; the closing phase should be controlled at about 90°.

    Key words: no-load line; closing overvoltage; ATP-EMTP; closing resistor; residual charge