Voltage Stability Bifurcation Analysis for AC/DC Systems with VSC-HVDC

Table 3

Power flow data at initial and maximum load states for mode “1.”

Variable	𝑈d	𝐼d	𝛿	𝑀	𝑃d	𝑄d
VSC1; parameters	2.0000	0.4551	0.1370	0.8108	0.9153	0.1220
	2.0000	0.4584	0.1947	0.6840	0.9240	0.1220
VSC2; parameters	1.9863	−0.4551	−0.1292	0.9387	−0.8993	0.1734
	1.9862	−0.4584	−0.3065	0.5505	−0.8993	0.1734
Variable	𝑄s1	𝑄s2	𝑄s3	𝑄s6	𝑄s8	—
AC bus; parameters	−0.6999	0.1404	0.2347	0.0010	0.1045	—
	−0.0438	7.6425	1.5550	0.0014	0.5365	—